| Primary (First) - onion cooked onion |
| | | methyl propanesulfinate |
| | odor: cooked onion with fruity and light sweet aroma backnotes |
| | flavor: sweet onion juice character with a burning sensation |
| Secondary (Second) - onion cooked onion |
| FL | | butyl ethyl disulfide |
| | odor: sulfurous cooked onion garlic |
| | 3,5- | dimethyl-1,2-dithiolane |
| | odor: sulfurous onion cooked onion |
| | flavor: cooked onion cooked vegetable nutty |
| FL | 1,1- | propane dithiol |
| | odor: sulfurous cooked onion savory |
| FL | | propenyl propyl disulfide |
| | odor: sulfurous cooked onion |
| Tertiary (Third) - onion cooked onion |
| FL/FR | | dimethyl trisulfide |
| | odor: Sulfureous, alliaceous, cooked, savory, meaty, eggy and vegetative with a fresh, green, onion topnote |
| | flavor: Sulfureous, alliaceous, gassy, savory and meaty with a fresh, vegetative nuance |
| | 1,3- | dithiolane |
| | odor: sweet sulfurous onion |
| | flavor: sweet sulfurous ripe onion |
| Quaternary (Fourth) - onion cooked onion |
| FL | | methyl 2-thiofuroate |
| | odor: milky creamy fried cooked onion |
| | flavor: cabbage |
| Quinary (Fifth) - onion cooked onion |
| FL | 2-( | methyl thio) methyl-2-butenal |
| | odor: burnt matches cooked cabbage roasted onion |
| Senary (Sixth) - onion cooked onion |
| Septenary (Seventh) - onion cooked onion |
| Octonary (Eighth) - onion cooked onion |