| Primary (First) - gassy |
| FL | | diethyl disulfide |
| | odor: gassy ripe onion greasy garlic |
| | flavor: gassy onion |
| FL | 2- | ethyl-5-methyl furan |
| | odor: fresh gassy burnt |
| FL | (±)-2- | mercapto-5-methylheptan-4-one |
| | odor: gassy, tropical, grapefruit, muscat grape, grapes on the vine |
| | flavor: mushroom, meaty, roasted, nutty, toasted, and hazelnut |
| Secondary (Second) - gassy |
| FL | sec- | amyl mercaptan |
| FL | 3- | pentane thiol |
| | odor: sulfurous gassy durian fruity roasted savory |
| | flavor: meaty brothy |
| FL/FR | | propyl mercaptan |
| | odor: cabbage natural gas sweet onion |
| | flavor: alliaceous fresh meaty onion sulfurous |
| Tertiary (Third) - gassy |
| FL | iso | propyl mercaptan |
| | odor: strong ripe onion gassy meaty sulfurous |
| | flavor: Soft-boiled egg yolk, hydrogen sulfide, rich mouth feel, strong poultry, leek and onion-like |
| Quaternary (Fourth) - gassy |
| FL | 2- | hexyl thiophene |
| | odor: floral fruity gassy green meaty |
| FL | 3- | mercapto-2-butanone |
| | odor: sulfurous onion roasted gassy meaty |
| | flavor: Roasted meat, sulfurous and alliaceous with nuances of cabbage, coffee and pot roast with fatty drippings |
| Quinary (Fifth) - gassy |
| FL | | allyl thiopropionate |
| | odor: Fresh onion garlic-like with green gassy nuances |
| | flavor: Fresh onion with a green sweet vegetable nuance |
| Senary (Sixth) - gassy |
| FL/FR | (Z)-4- | hexen-1-ol |
| | odor: green cooked vegetable tomato cooked turnup brothy gassy |
| | flavor: Green, tomato, fresh with herbal vegetable nuances |
| Septenary (Seventh) - gassy |
| Octonary (Eighth) - gassy |