FL‐no	EU Union List name	CAS no	VCF online (Triskelion, 2018)
02.192	Oct‐2‐en‐1‐ol	22104‐78‐5	Quantified in apple, asparagus, beef, desert truffle, fish, malt, oysters, potato, Vaccinium species from 0.0007 up to 4.36 mg/kg and up to 7.5 mg/kg in mushroom. Identified in black currants, capers, date, olive, soybean, tea, truffle and wine
02.231	tr‐2, cis‐6‐Nonadien‐1‐ol	28069‐72‐9	Quantified in brown algae, melon, milk products, prickly pear from 0.0002 up to 1.87 mg/kg and identified in cucumber, fish, malt, pepino fruit, rapeseed, spinach and tea
05.072 1362	trans‐2‐Nonenal	18829‐56‐6	Quantified in more than 50 food items with up to 46 mg/kg in vanilla and up to 1,000 mg/kg in citrus fruits and identified in more than 40 other food items, e.g. nuts, shrimps, tomatoes and rice
05.081	2,4‐Decadienal	2363‐88‐4	Quantified in beef, cabbage, chicken, citrus fruits, guinea hen, lamb, malt, Mangifera species, peanut, potato chips, tea, tomato and Vaccinium species from 0.0001 up to 1,000 mg/kg in maize and up to 2,000 mg/kg in mentha oils. Identified in more than 30 food items, e.g. beans, cassava and eggs
05.144	Dodec‐2(trans)‐enal	20407‐84‐5	Quantified in chicken, citrus fruits, coriander seed, milk products and olive from 0.002 up to 4,400 mg/kg and up to 27,000 mg/kg in coriander leaf. Identified in allium species, ginger, mushrooms and peanut
05.184	Undec‐2(trans)‐enal	53448‐07‐0	Quantified in black currant, camomile, chicken, citrus fruits, fig, fish, guinea hen, maize, milk products, pecan and tea from 0.002 up to 1,300 mg/kg and up to 7,000 mg/kg in camomile. Identified in beef, cashew apple, Chinese liquor, coriander leaf and seed, katsuobushi, mate, mushroom, olive, peanut, potato chips, rambutan, rice, rooibos tea and sesame seed (roasted)
05.186	2,4‐Octadienal	5577‐44‐6	Quantified in peanut up to 0.001 mg/kg and identified in banana, buckwheat, caviar, cheese, fish, katsuobushi, oats, prickly pear, rice, rooibos tea, sesame seed, soybean and wheaten bread
05.189	2‐Hexenal	505‐57‐7	Quantified in beer, cabbage, cauliflower and broccoli, chicken, citrus fruits, loganberry juice, malt, olive, origanum, peanut, raspberry, blackberry and boysenberry and tea from trace up to 160 mg/kg and up to 26,000 mg/kg in lemon balm. Identified in nearly 40 food items e.g. beans, beef, caviar, cucumber and kiwifruit
05.190	trans‐2‐Octenal	2548‐87‐0	Quantified in processed apples, apricot, beef, beer, black currant, brown algae, camomile, chicken, citrus fruits, truffle, fig, fish, ginger, guava and feyoa, guinea hen, maize, Mangifera species, melon, mentha oils, milk, mushroom, plum, pork, potato, potato chips, rice, rice cake, sherry, tomato, Vaccinium species, vanilla and wine. Identified in more than 40 other food items e.g. allium species, avocado, capsicum species, cocoa, date, egg, honey, olive and peanut
05.191	trans‐2‐Decenal	3913‐81‐3	Quantified in more than 30 food items with up to 2,000 mg/kg in camomile and citrus fruits, up to 130,000 mg/kg in caraway and up to 268,000 mg/kg in coriander leaf. Identified in more than 20 other food items, e.g. gin, buckwheat and ginger
05.194	tr‐2, tr‐4‐Nonadienal	5910‐87‐2	Quantified in 30 food items e.g. milk and milk products, oats and chicken from trace amounts up to 7.41 mg/kg in capers. Identified in more than 20 other food items, e.g. beef, cheese, raspeberry and sesame seed.
05.195	trans‐2‐Tridecenal	7069‐41‐2	Quantified in citrus fruits up to 100 mg/kg and milk and milk products, 2.4 mg/kg, and identified in chicken, coriander leaf or tea
05.196	tr‐2, tr‐4‐Undecadienal	30361‐29‐6	Quantified in beer, chicken and potato chips from 0.0003 up to 0.1 mg/kg
08.072	But‐2‐enoic acid (cis and trans)	3724‐65‐0	Quantified in mussels, 0.16 mg/kg and identified in banana, beer, bread and bread preferment, cherimoya, cocoa, coffee, fish, honey, papaya, passion fruit, shoyu, soybean and tea
08.083	Hept‐2‐enoic acid	18999‐28‐5	Quantified in beer, < 0.01 mg/kg and identified in chicken
08.101	Non‐2‐enoic acid	3760‐11‐0	Quantified in beer, < 0.01 mg/kg and identified in chicken and lamb and mutton
08.119	2‐Hexenoic acid	1191‐04‐4	Quantified in black choke berry juice, 0.14 mg/kg and lamb and mutton, 0.04 mg/kg and identified in processed apple, beer, chicken, gabiroba, hop, kumazasa, papaya, raspberry, blackberry and boysenberry, rice and strawberry
08.120	2‐Methyl‐2‐butenoic acid	13201‐46‐2	Identified in coffee, honey, katsuobushi, shoyu and strawberry
09.181	Methyl hex‐2‐enoate	2396‐77‐2	Quantified in mountain papaya < 0.01 mg/kg and papaya 0.0001 mg/kg. Identified in peas and soursop
09.247	Allyl crotonate	20474‐93‐5	Identified in hazelnut (filbert)
09.248	Ethyl trans‐2‐butenoate	623‐70‐1	Quantified in guava and feyoa from 0.25 to 1.25 mg/kg, licorice, 0.11 mg/kg, melon up to 0.0006 mg/kg, mussels, 0.99 mg/kg, passion fruit, 0.08 mg/kg and pawpaw, 0.095 mg/kg. Identified in apple, babaco fruit, cashew apple wine, citrus fruits, durian, guava wine, Mangifera species, mountain papaya, naranjilla fruit, pineapple, rambutan and wine
09.266 1807	Hexyl 2‐butenoate	19089‐92‐0	Quantified in mountain papaya, < 0.01 mg/kg and identified in apple, cherimoya and plum
09.287	Propyl deca‐2,4‐dienoate	28316‐62‐3	Identified in pear and pear brandy
09.321	Butyl 2‐methylbut‐2(cis)‐enoate	7785‐64‐0	Quantified in camomile from 7,600 up to 9,000 mg/kg
09.324	Butyl but‐(2E)‐enoate	591‐63‐9	Quantified in passion fruit, < 0.01 mg/kg and pawpaw, 0.024 mg/kg. Identified in babaco fruit, citrus fruits, Mangifera species, mountain papaya and caja fruit (tapereba)
09.326	Butyl deca‐(2E,4Z)‐dienoate	28369‐24‐6	Quantified in apple from 0.2 to 0.3 mg/kg and identified in pear and pear brandy
09.329	Butyl hex‐2‐enoate	13416‐74‐5	No natural occurrence data
09.330	Butyl hex‐(3E)‐enoate	118869‐62‐8	Quantified in passion fruit < 0.01 mg/kg
09.335	Butyl oct‐2‐enoate	57403‐32‐4	Identified in mountain papaya
09.365	Ethyl 3‐methylcrotonate	638‐10‐8	Identified in cashew apple, cocoa, Mangifera species and Vaccinium species
09.370	Ethyl dec‐9‐enoate	67233‐91‐4	Quantified in cheese, Chinese quince, grape brandy, guava and feyoa, litchi wine, olive and wine from 0 up to 0.9 mg/kg in whisky. Identified in apple brandy, beer, bilberry wine, cider, guava wine, sherry and strawberry wine
09.372	Ethyl dodec‐(2E)‐enoate	28290‐90‐6	Identified in pear and pear brandy and in quince (marmelo)
09.374	Ethyl hept‐(2E)‐enoate	54340‐72‐6	Identified in wine
09.375	Ethyl methacrylate	97‐63‐2	Identified in litchi, Mangifera species, quince (marmelo) and starfruit
09.379	Ethyl pent‐2‐enoate	2445‐93‐4	Identified in grape
09.400	Hex‐2‐enyl phenylacetate	68133‐78‐8	Identified in mentha oils
09.578	Hexyl (E)‐but‐2‐enoate	1617‐25‐0	Quantified in passion fruit, < 0.01 mg/kg and identified in babaco fruit
09.586	Isobutyl 2‐methylprop‐2‐enoate	97‐86‐9	Quantified in camomile, 16,200 mg/kg
09.596	Isopentyl‐(Z)‐but‐2‐enoate	10482‐55‐0	Quantified in camomile, 43,400 mg/kg
09.603	Isopropyl crotonate	6284‐46‐4	No natural occurrence data
09.624	Methyl 2‐methylcrotonate	6622‐76‐0	Identified in camomile, Mangifera species, naranjilla fruit, pineapple and starfruit
09.625	Methyl 2‐methylpent‐3(E)‐enoate	33603‐30‐4	No natural occurrence data
09.636	Methyl crotonate	623‐43‐8	Quantified in strawberry from 0.0019 to 0.0072 mg/kg and identified in chestnut, Mangifera species, naranjilla fruit, pineapple and soursop
09.637	Methyl dec‐2‐enoate	2482‐39‐5	No product occurrence data
09.641	Methyl dodec‐(2E)‐enoate	6208‐91‐9	Identified in pear
09.647 1834	Methyl methacrylate	80‐62‐6	Identified in beef, Mangifera species, wheaten bread and wine
09.652	Methyl oleate	112‐62‐9	Quantified in allium species, cocoa and noni from 0.08 up to 25 mg/kg in vanilla. identified in babaco fruit, buckwheat, cape gooseberry, melon, pear, pineapple and walnut
09.680	Pentyl 2‐methylisocrotonate	7785‐63‐9	Quantified in camomile
09.699	Propyl crotonate	10352‐87‐1	Identified in camomile
09.865	Hexyl (9Z)‐octadecenoate	20290‐84‐0	No natural occurrence data
09.866	Allyl valerate	6321‐45‐5	No natural occurrence data
09.934 1630	Methyl (5Z)‐Octenoate	41654‐15‐3	Identified in pineapple
09.942	2‐Methylbutyl‐3‐methyl‐2‐butenoate	97890‐13‐6	No natural occurrence data
09.948	(2E)‐2‐Nonenyl acetate	30418‐89‐4	No natural occurrence data

FL‐no: FLAVIS number; CAS: Chemical Abstract Service.