Category: flavor and fragrance agents
US / EU / FDA / JECFA / FEMA / FLAVIS / Scholar / Patent Information:
Physical Properties:
Appearance: | pale yellow to yellowish orange clear liquid (est) |
Assay: | 97.00 to 100.00 %
|
Food Chemicals Codex Listed: | No |
Specific Gravity: | 1.04800 to 1.05800 @ 25.00 °C.
|
Pounds per Gallon - (est).: | 8.720 to 8.804
|
Refractive Index: | 1.52300 to 1.53300 @ 20.00 °C.
|
Melting Point: | 121.00 to 123.00 °C. @ 1.00 mm Hg
|
Boiling Point: | 96.00 to 99.00 °C. @ 20.00 mm Hg
|
Boiling Point: | 200.00 to 201.00 °C. @ 760.00 mm Hg
|
Vapor Pressure: | 0.291000 mmHg @ 25.00 °C. (est) |
Vapor Density: | 4.6 ( Air = 1 ) |
Flash Point: | 174.00 °F. TCC ( 78.89 °C. )
|
logP (o/w): | 1.113 (est) |
Soluble in: |
| alcohol | | water, slightly | | water, 2416 mg/L @ 25 °C (est) |
Insoluble in: |
| water |
Stability: |
| stable in most media |
Organoleptic Properties:
|
Odor Type: earthy |
|
| earthy potato baked potato peanut roasted peanut |
Odor Description: at 0.10 % in dipropylene glycol. | earthy baked potato peanut roasted |
|
| sweet nutty roasted toasted grain coffee corn savory meaty |
Odor Description: at 1.00 %. | Sweet, nutty, roasted, toasted, grainy, coffee and corn with savory, meaty nuances Mosciano, Gerard P&F 23, No. 2, 43, (1998) |
|
|
Flavor Type: nutty |
|
| musty nutty roasted grain coffee |
Taste Description: at 15.00 ppm. | Musty, nutty, roasted and grainy with coffee notes Mosciano, Gerard P&F 23, No. 2, 43, (1998) |
|
Odor and/or flavor descriptions from others (if found). |
|
R C Treatt & Co Ltd |
5-Methyl-6,7-dihydrocyclopentapyrazine Halal, Kosher |
Odor Description: | earthy, baked potato, roasted, peanut |
Taste Description: | earthy Used in confectionery at 1ppm, meat products at 0.5ppm, desserts and chewing gum at 0.2ppm, and beverages at 0.05ppm. |
|
Pell Wall Perfumes |
Nutty Pyrazine |
Odor Description: | Sweet, nutty, roasted, earthy, coffee, popcorn As with all pyrazines this is used in tiny traces – Nutty Pyrazine at 0.1% in IPM has a powerful, sweet, nutty, roasted, toasted, earthy, grainy, coffee and popcorn odour with savoury nuances.
Even at this dilution this is a very powerful and diffusive material, that is present in the natural aroma of coffee as well as a range of nuts. Often used in the flavouring industry to enhance the scent of popcorn.
In fragrances most common as part of a chocolate or other gourmand aroma but can also be used as part of a nutty or smoky accord. |
|
|
Cosmetic Information:
Suppliers:
Advanced Biotech |
5H-5-METHYL-6,7 DIHYDROCYCLOPENTA (B) PYRAZINE
|
Ambles Nature et Chimie |
CORYLONE PYRAZINE
|
Anhui Haibei |
5-Methyl-6,7-dihydro-cyclopenta pyrazine
Odor: Earthy baked potato peanut roasted |
Beijing Lys Chemicals |
6,7-Dihydro-5-methyl-5h-cyclopenta-1,4-diazine
|
BOC Sciences |
For experimental / research use only. |
5-Methyl-6,7-dihydro-5H-cyclopenta(b)pyrazine
|
Charkit Chemical |
METHYL DIHYDROCYCLOPENTA PYRAZINE FEMA 3306
|
Endeavour Specialty Chemicals |
5-Methyl-6,7-dihydrocyclopentapyrazine 98% F&F
|
Speciality Chemical Product Groups |
Frutarom |
METHYL DIHYDROCYCLOPENTAPYRAZINE
KOSHER Flavor: Earthy, Nutty, Roasted, Potato, Sweet |
CBD Offering |
IFF |
METHYL DIHYDROCYCLOPENTAPYRAZINE
KOSHER Flavor: Earthy, Nutty, Roasted, Potato, Sweet |
Jiangyin Healthway |
5H-5-methyl-6,7-dihydrocyclopentapyrazine
|
New functional food ingredients |
Jinan Enlighten Chemical Technology(Wutong Aroma ) |
5-Methyl-6,7-dihydro-5H-cyclopenta(b)pyrazine, Kosherk
|
Lluch Essence |
PYRAZINE, 5-METHYL-6,7-DIHYDROCYCLOPENTA-
|
M&U International |
5H-5-METHYL-6,7-DIHYDROCYCLOPENTAPYRAZINE, Kosher
|
Pearlchem Corporation |
5H-5-Methyl-6,7-dihydrocyclopenta Pyrazine
|
Pell Wall Perfumes |
Nutty Pyrazine
Odor: Sweet, nutty, roasted, earthy, coffee, popcorn Use: As with all pyrazines this is used in tiny traces – Nutty Pyrazine at 0.1% in IPM has a powerful, sweet, nutty, roasted, toasted, earthy, grainy, coffee and popcorn odour with savoury nuances.
Even at this dilution this is a very powerful and diffusive material, that is present in the natural aroma of coffee as well as a range of nuts. Often used in the flavouring industry to enhance the scent of popcorn.
In fragrances most common as part of a chocolate or other gourmand aroma but can also be used as part of a nutty or smoky accord. |
Penta International |
5H-5-METHYL-6,7-DIHYDROCYCLOPENTA-(b)-PYRAZINE
|
R C Treatt & Co Ltd |
5-Methyl-6,7-dihydrocyclopentapyrazine (1% in DPG)
Halal, Kosher |
R C Treatt & Co Ltd |
5-Methyl-6,7-dihydrocyclopentapyrazine (1% in TEC)
Halal, Kosher |
R C Treatt & Co Ltd |
5-Methyl-6,7-dihydrocyclopentapyrazine
Halal, Kosher Odor: earthy, baked potato, roasted, peanut Flavor: earthy Used in confectionery at 1ppm, meat products at 0.5ppm, desserts and chewing gum at 0.2ppm, and beverages at 0.05ppm. |
Riverside Aromatics |
MAPLE LACTONE PYRAZINE [METHYLDIHYDROCYCLOPENTAPYRAZINE]
|
Robinson Brothers |
5-Methyl-6,7-dihydrocyclopentapyrazine F&F
|
https://www.robinsonbrothers.uk/chemistry-competences |
Shijiazhuang Donglian Nankai Aroma Chemicals |
6,7-Dihydro-5-methyl-5(H)-cyclopentapyrazine
Odor: Fried peanuts |
Sigma-Aldrich |
5H-5-Methyl-6,7-dihydrocyclopenta[b]pyrazine, ≥97%, FG
Odor: earthy; peanut |
Certified Food Grade Products |
Sunaux International |
5H-5-Methyl-6,7-dihydrocyclopentapyrazine
|
Synerzine |
5H-5-Methyl-6,7-Dihydrocyclopentapyrazine
|
Taytonn ASCC |
Methyl Dihydrocyclopentapyrazine
Odor: Nutty, Sweet |
TCI AMERICA |
For experimental / research use only. |
5H-5-Methyl-6,7-dihydrocyclopentapyrazine >97.0%(GC)(T)
|
Tengzhou Jitian Aroma Chemiclal |
5H-5-Methyl -6.7-dihydro cyclopenta pyrazine
|
Tengzhou Xiang Yuan Aroma Chemicals |
5H-5-Methyl-6,7-Dihydrocyclopenta Pyrazine
|
United International |
5h-5-Methyl-6,7-Dihydrocylopentapyrazine
|
Vigon International |
Methyl-5 6,7-dihydro 5H-cyclopenta (beta) Pyrazine
|
WholeChem |
5H-5-methyl-6.7-dihydrocyclopentapyrazine
|
Safety Information:
Preferred SDS: View |
European information : |
Most important hazard(s): | Xi - Irritant |
R 36/37/38 - Irritating to eyes, respiratory system, and skin. S 02 - Keep out of the reach of children. S 24/25 - Avoid contact with skin and eyes. S 26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S 37/39 - Wear suitable gloves and eye/face protection.
|
|
Hazards identification |
|
Classification of the substance or mixture |
GHS Classification in accordance with 29 CFR 1910 (OSHA HCS) |
None found. |
GHS Label elements, including precautionary statements |
|
Pictogram | |
|
Hazard statement(s) |
None found. |
Precautionary statement(s) |
None found. |
Oral/Parenteral Toxicity: |
Not determined
|
Dermal Toxicity: |
Not determined
|
Inhalation Toxicity: |
Not determined
|
Safety in Use Information:
Category: | flavor and fragrance agents |
RIFM Fragrance Material Safety Assessment: Search |
IFRA Code of Practice Notification of the 49th Amendment to the IFRA Code of Practice |
Recommendation for nutty pyrazine usage levels up to: | | 0.0500 % in the fragrance concentrate.
|
|
Maximised Survey-derived Daily Intakes (MSDI-EU): | 3.90 (μg/capita/day) |
Maximised Survey-derived Daily Intakes (MSDI-USA): | 4.00 (μg/capita/day) |
Structure Class: | II |
Use levels for FEMA GRAS flavoring substances on which the FEMA Expert Panel based its judgments that the substances are generally recognized as safe (GRAS). |
The Expert Panel also publishes separate extensive reviews of scientific information on all FEMA GRAS flavoring substances and can be found at FEMA Flavor Ingredient Library |
publication number: 5 |
Click here to view publication 5 |
| average usual ppm | average maximum ppm |
baked goods: | - | - |
beverages(nonalcoholic): | - | 0.04500 |
beverages(alcoholic): | - | - |
breakfast cereal: | - | - |
cheese: | - | - |
chewing gum: | - | 0.15000 |
condiments / relishes: | - | - |
confectionery froastings: | - | - |
egg products: | - | - |
fats / oils: | - | - |
fish products: | - | - |
frozen dairy: | - | 0.25000 |
fruit ices: | - | 0.25000 |
gelatins / puddings: | - | - |
granulated sugar: | - | - |
gravies: | - | - |
hard candy: | - | 1.00000 |
imitation dairy: | - | - |
instant coffee / tea: | - | - |
jams / jellies: | - | - |
meat products: | - | - |
milk products: | - | - |
nut products: | - | - |
other grains: | - | - |
poultry: | - | - |
processed fruits: | - | - |
processed vegetables: | - | - |
reconstituted vegetables: | - | - |
seasonings / flavors: | - | - |
snack foods: | - | - |
soft candy: | - | - |
soups: | - | - |
sugar substitutes: | - | - |
sweet sauces: | - | - |
Safety References:
Flavor & Extract Manufacturers Association (FEMA) reference(s): |
The FEMA GRAS assessment of pyrazine derivatives used as flavor ingredients. View pdf |
European Food Safety Athority(EFSA): | Flavor usage levels; Subacute, Subchronic, Chronic and Carcinogenicity Studies; Developmental / Reproductive Toxicity Studies; Genotoxicity Studies... |
European Food Safety Authority (EFSA) reference(s): |
Opinion of the Scientific Panel on food additives, flavourings, processing aids and materials in contact with food (AFC) on a request from the Commission related to Flavouring Group Evaluation 17 (FGE.17): Pyrazine derivatives from chemical group 24 (Commission Regulation (EC) No 1565/2000 of 18 July 2000) View page or View pdf |
Flavouring Group Evaluation 50 (FGE.50): Consideration of pyrazine derivatives evaluated by JECFA (57th meeting) structurally related to pyrazine derivatives evaluated by EFSA in FGE.17 (2005) (Commission Regulation (EC) No 1565/2000 of 18 July 2000) - Opinion of the Scientific Panel on Food Additives, Flavourings, Processing Aids and Materials in contact with Food (AFC) View page or View pdf |
Flavouring Group Evaluation 17, Revision 1 (FGE.17Rev1): Pyrazine derivatives from chemical group 24 - Opinion of the Scientific Panel on Food Additives, Flavourings, Processing Aids and Materials in contact with Food (AFC) [1] View page or View pdf |
Scientific Opinion on Flavouring Group Evaluation 17, Revision 2 (FGE.17Rev2): Pyrazine derivatives from chemical group 24 View page or View pdf |
Scientific Opinion on Flavouring Group Evaluation 50, Revision 1 (FGE.50Rev1): Consideration of pyrazine derivatives evaluated by JECFA (57th meeting) structurally related to pyrazine derivatives evaluated by EFSA in FGE.17Rev2 (2010) View page or View pdf |
Safety and efficacy of pyrazine derivatives including saturated ones belonging to chemical group 24 when used as flavourings for all animal species View page or View pdf |
EPI System: | View |
AIDS Citations: | Search |
Cancer Citations: | Search |
Toxicology Citations: | Search |
EPA Substance Registry Services (TSCA): | 23747-48-0 |
EPA ACToR: | Toxicology Data |
EPA Substance Registry Services (SRS): | Registry |
Laboratory Chemical Safety Summary : | 32065 |
National Institute of Allergy and Infectious Diseases: | Data |
WGK Germany: | 3 |
| 7-methyl-6,7-dihydro-5H-cyclopenta[b]pyrazine |
Chemidplus: | 0023747480 |
| (7R)-7-methyl-6,7-dihydro-5H-cyclopenta[b]pyrazine |
| (7S)-7-methyl-6,7-dihydro-5H-cyclopenta[b]pyrazine |
References:
Other Information:
Potential Blenders and core components note
|
For Odor |
No odor group found for these |
1- | propanoyl pyrrole | |
| sulfuryl octanoate | FL/FR |
|
| sulfuryl butyrate | FL/FR |
| sulfuryl decanoate | FL/FR |
| sulfuryl hexanoate | FL/FR |
| sulfuryl isobutyrate | FL/FR |
| sulfuryl propionate | FL/FR |
alcoholic |
| propyl alcohol | FL/FR |
anisic |
para- | anisaldehyde | FL/FR |
balsamic |
2- | acetyl furan | FL/FR |
iso | butyl cinnamate | FL/FR |
| ethyl cinnamate | FL/FR |
| methyl cinnamate | FL/FR |
3- | phenyl propyl alcohol | FL/FR |
bready |
| coffee furanone | FL/FR |
| cyclotene | FL/FR |
| immortelle absolute | FL/FR |
| maltol | FL/FR |
| strawberry furanone | FL/FR |
chocolate |
iso | amyl phenyl acetate | FL/FR |
| chocolate pyrazine A | FL/FR |
| cocoa hexenal | FL/FR |
2,5- | dimethyl pyrazine | FL/FR |
2- | methoxy-3-methyl pyrazine | FL/FR |
coconut |
gamma- | nonalactone (aldehyde C-18 (so-called)) | FL/FR |
gamma- | octalactone | FL/FR |
coffee |
| coffea arabica seed extract | FL/FR |
| popcorn pyrimidine | FL/FR |
earthy |
2- | ethyl-3-methoxypyrazine | FL/FR |
floral |
| ethyl phenyl acetate | FL/FR |
2- | heptyl furan | FL/FR |
hay |
| beeswax absolute | FL/FR |
honey |
| phenyl acetic acid | FL/FR |
medicinal |
| quinoline | CS |
musty |
2- | acetyl pyrrole | FL/FR |
3- | acetyl-2,5-dimethyl furan | FL/FR |
| menthofuran | FL/FR |
nutty |
3- | acetyl pyridine | FL/FR |
2- | acetyl-3-ethyl pyrazine | FL/FR |
2- | acetyl-3-methyl pyrazine | FL/FR |
2- | acetyl-3,5-dimethyl pyrazine | FL/FR |
3,6- | cocoa pyrazine | FL/FR |
3,5- | cocoa pyrazine | FL/FR |
2,3- | dimethyl pyrazine | FL/FR |
2- | ethyl pyrazine | FL/FR |
| filbert heptenone | FL/FR |
| filbert pyrazine | FL/FR |
(E)- | filbertone | FL/FR |
2,6- | lutidine | FL/FR |
| methoxymethyl pyrazine | FL/FR |
2- | methyl pyrazine | FL/FR |
5- | methyl quinoxaline | FL/FR |
2- | methyl thio-3,5 or 6-methyl pyrazine | FL/FR |
| nutty cyclohexenone | FL/FR |
| nutty quinoxaline | FL/FR |
| peanut fragrance | FR |
| sesame absolute CO2 extract | FL/FR |
2,3,5,6- | tetramethyl pyrazine | FL/FR |
2,3,5- | trimethyl pyrazine | FL/FR |
| vinyl sulfurol | FL/FR |
popcorn |
2- | acetyl pyrazine | FL/FR |
2- | acetyl thiazole | FL/FR |
powdery |
para- | anisyl alcohol | FL/FR |
roasted |
2- | acetyl-2-pyrroline | |
| trigonella foenum-graecum seed oil CO2 extract | FL/FR |
spicy |
| cassia bark oil china | FL/FR |
| clove bud oil | FL/FR |
alpha- | methyl cinnamaldehyde | FL/FR |
sulfurous |
| furfuryl thioacetate | FL/FR |
tonka |
| tonka bean absolute | FR |
vanilla |
| ethyl vanillin | FL/FR |
| vanilla bean absolute (vanilla planifolia) | FL/FR |
| vanillyl acetate | FL/FR |
vegetable |
| methional | FL/FR |
waxy |
| butyl laurate | FL/FR |
woody |
| cedrenyl acetate | FR |
4- | hydroxybenzaldehyde | FL/FR |
2- | methoxy-4-vinyl phenol | FL/FR |
|
For Flavor |
|
No flavor group found for these |
2- | acetyl-2-pyrroline | |
2(4)-iso | butyl-4(2),6-dimethyl dihydro-4H-1,3,5-dithiazine | FL |
| chocolate pyrazine A | FL/FR |
6,7- | dihydro-2,3-dimethyl-5H-cyclopentapyrazine | FL |
| dimethyl dihydrocyclopentapyrazine | FL |
2,5- | dimethyl thiazole | FL |
2- | ethyl-3-methoxypyrazine | FL/FR |
(E)- | filbertone | FL/FR |
| green pea pyrazine | FL |
2- | methoxy-3-propyl pyrazine | FL |
2- | methoxy-6-methyl pyrazine | FL |
| methyl 2-(methyl thio) acetate | FL |
| methyl octyl sulfide | FL |
4-( | methyl thio) butanol | FL |
| peanut dithiazine | FL |
| pyrazines mixture | FL |
| sulfuryl butyrate | FL/FR |
| sulfuryl decanoate | FL/FR |
| sulfuryl hexanoate | FL/FR |
| sulfuryl isobutyrate | FL/FR |
|
| sulfuryl formate | FL |
| sulfuryl octanoate | FL/FR |
| sulfuryl propionate | FL/FR |
alcoholic |
| propyl alcohol | FL/FR |
alliaceous |
3- | mercapto-2-pentanone | FL |
2- | methyl thioacetaldehyde | FL |
astringent |
1- | propanoyl pyrrole | |
balsamic |
iso | butyl cinnamate | FL/FR |
| ethyl cinnamate | FL/FR |
brown |
| beeswax absolute | FL/FR |
burnt |
2- | methyl quinoxaline | FL |
buttery |
| diacetyl | FL |
caramellic |
| caramel furanone | FL |
| cyclotene | FL/FR |
| maltol | FL/FR |
| strawberry furanone | FL/FR |
cocoa |
| chocolate enhancers | FL |
| cocoa hexenal | FL/FR |
coconut |
gamma- | nonalactone (aldehyde C-18 (so-called)) | FL/FR |
coffee |
| coffea arabica seed extract | FL/FR |
corn chip |
2- | acetyl thiazole | FL/FR |
2- | acetyl-2-thiazoline | FL |
| popcorn pyrimidine | FL/FR |
creamy |
para- | anisaldehyde | FL/FR |
4- | hydroxybenzaldehyde | FL/FR |
earthy |
(±)-2- | mercapto-5-methylheptan-4-one | FL |
fatty |
2- | heptyl furan | FL/FR |
fishy |
4,5- | dimethyl thiazole | FL |
floral |
iso | amyl phenyl acetate | FL/FR |
| phenyl acetic acid | FL/FR |
fruity |
para- | anisyl alcohol | FL/FR |
green |
| dihydroxyacetophenone (mixed isomers) | FL |
| immortelle absolute | FL/FR |
| propylene glycol acetone ketal | FL |
honey |
| ethyl phenyl acetate | FL/FR |
lactonic |
gamma- | octalactone | FL/FR |
meaty |
| propyl 2-mercaptopropionate | FL |
milky |
dextro,laevo-3-( | methyl thio) butanone | FL |
musty |
2,5- | dimethyl pyrazine | FL/FR |
2- | ethoxythiazole | FL |
| menthofuran | FL/FR |
2,3,5- | trimethyl pyrazine | FL/FR |
nutty |
2- | acetyl furan | FL/FR |
3- | acetyl pyridine | FL/FR |
2- | acetyl pyrrole | FL/FR |
3- | acetyl-2,5-dimethyl furan | FL/FR |
2- | acetyl-3-ethyl pyrazine | FL/FR |
2- | acetyl-3-methyl pyrazine | FL/FR |
2- | acetyl-3,5-dimethyl pyrazine | FL/FR |
| arachis hypogaea fruit extract | FL |
2- | butyl-2-butenal | FL |
roasted | chestnut flavor | FL |
3,6- | cocoa pyrazine | FL/FR |
3,5- | cocoa pyrazine | FL/FR |
3,5(6)- | cocoa pyrazine | FL |
| coffee furanone | FL/FR |
2,3- | dimethyl pyrazine | FL/FR |
2- | ethyl pyrazine | FL/FR |
2- | ethyl-6-methyl pyrazine | FL |
| filbert heptenone | FL/FR |
| filbert pyrazine | FL/FR |
2,6- | lutidine | FL/FR |
2- | methoxy-3-methyl pyrazine | FL/FR |
| methoxymethyl pyrazine | FL/FR |
2- | methyl pyrazine | FL/FR |
5- | methyl quinoxaline | FL/FR |
2- | methyl thio-3,5 or 6-methyl pyrazine | FL/FR |
| nutty cyclohexenone | FL/FR |
| nutty quinoxaline | FL/FR |
| nutty thiazole | FL |
| peanut brittle flavor | FL |
roasted | peanut flavor | FL |
| peanut flavor | FL |
| peanut oxazole | FL |
| sesame absolute CO2 extract | FL/FR |
| sesame distillates | FL |
2,3,5,6- | tetramethyl pyrazine | FL/FR |
| vinyl sulfurol | FL/FR |
popcorn |
2- | propionyl-2-thiazoline | FL |
roasted |
2- | acetyl pyrazine | FL/FR |
| ethyl 3-(furfuryl thio) propionate | FL |
| furfuryl thioacetate | FL/FR |
| trigonella foenum-graecum seed oil CO2 extract | FL/FR |
smoky |
2- | methoxy-4-vinyl phenol | FL/FR |
spicy |
| cassia bark oil china | FL/FR |
| clove bud oil | FL/FR |
alpha- | methyl cinnamaldehyde | FL/FR |
| methyl cinnamate | FL/FR |
3- | phenyl propyl alcohol | FL/FR |
sulfurous |
| potato butanone | FL |
tomato |
| methional | FL/FR |
vanilla |
| ethyl vanillin | FL/FR |
| vanilla bean absolute (vanilla planifolia) | FL/FR |
| vanillyl acetate | FL/FR |
vegetable |
| potato butyraldehyde | FL |
waxy |
| butyl laurate | FL/FR |
winey |
5- | ethyl-2-methyl pyridine | FL |
|
Potential Uses:
Occurrence (nature, food, other): note
Synonyms:
| corylone pyrazine (Givaudan) | 5H- | cyclopenta[b]pyrazine, 6,7-dihydro-5-methyl- | 5H- | cyclopentapyrazine, 6,7-dihydro-5-methyl- | 6,7- | dihydro-5-methyl-5 -cyclopentapyrazine | 6,7- | dihydro-5-methyl-5h-cyclopenta 1,4-diazine | 6,7- | dihydro-5-methyl-5H-cyclopenta[b]pyrazine | 6,7- | dihydro-5-methyl-5H-cyclopentapyrazine | | maple lactone pyrazine | | methyl dihydrocyclopentapyrazine | 4- | methyl dihydrocyclopentapyrazine | 9- | methyl-2,5-diazabicyclo(4.3.0)nona-1,3,5-triene | 5- | methyl-5,6,7-trihydrocyclopenta[2,1-b]pyrazine | 5- | methyl-6,7-dihydro-5H-cyclopenta[b]pyrazine | 7- | methyl-6,7-dihydro-5H-cyclopenta[b]pyrazine | 5- | methyl-6,7-dihydro-5H-cyclopentapyrazine | 5H-5- | methyl-6,7-dihydrocyclopenta-(b)-pyrazine | 5H-5- | methyl-6,7-dihydrocyclopenta(b)pyrazine | 5H-5- | methyl-6,7-dihydrocyclopenta(beta)pyrazine | 5H-5- | methyl-6,7-dihydrocyclopenta[b]pyrazine | 5- | methyl-6,7-dihydrocyclopentapyrazine | 5H-5- | methyl-6,7-dihydrocyclopentapyrazine | 5H- | methyl6,7dihydrocyclopenta B pyrazine | 5- | methylene-6,7-dihydro-cyclopenta[b]pyrazine | | popcorn chemical 0.1% ethanol synthetic |
Articles:
|