Aroma Chemistry Revision - aroma compunds

When it comes to revising aroma chemistry, Wikipedia is a very useful tool allowing you to flick from one article to another using tables like that below

Esters

Compound name	Fragrance	Natural occurrence	Chemical structure
Methyl formate	Ethereal
Methyl acetate	Sweet, nail polish Solvent
Methyl butyrate Methyl butanoate	Fruity, Apple Pineapple
Ethyl acetate	Sweet, solvent	Wine
Ethyl butyrate Ethyl butanoate	Fruity, Orange Pineapple
Isoamyl acetate	Fruity, Banana Pear	Banana plant
Pentyl butyrate Pentyl butanoate	Fruity, Pear Apricot
Pentyl pentanoate	Fruity, Apple
Octyl acetate	Fruity, Orange

Linear terpenes

Compound name	Fragrance	Natural occurrence	Chemical structure
Myrcene	Woody, complex	Verbena, Bay
Geraniol	Rose, flowery	Geranium, Lemon
Nerol	Sweet rose, flowery	Neroli, Lemongrass
Citral, lemonal Geranial, neral	Lemon	Lemon myrtle, Lemongrass
Citronellal	Lemon	Lemongrass
Citronellol	Lemon	Lemongrass, rose Pelargonium
Linalool	Floral, sweet Woody, Lavender	Coriander, Sweet basil Lavender
Nerolidol	Woody, fresh bark	Neroli, ginger Jasmine

Cyclic terpenes

Compound name	Fragrance	Natural occurrence	Chemical structure
Limonene	Orange	Orange, lemon
Camphor	Camphor	Camphor laurel
Terpineol	Lilac	Lilac, Cajuput
alpha-Ionone	Violet, woody	Violet
Thujone	Minty	Cypress, lilac Juniper

Aromatic

Compound name	Fragrance	Natural occurrence	Chemical structure
Benzaldehyde	Almond	Bitter almond
Eugenol	Clove	Clove
Cinnamaldehyde	Cinnamon	Cassia Cinnamon
Ethyl maltol	Cooked fruit Caramelized sugar
Vanillin	Vanilla	Vanilla
Anisole	Anise	Anise
Anethole	Anise	Anise Sweet basil
Estragole	Tarragon	Tarragon
Thymol	Thyme	Thyme

Essentia