Table 1. Volatile compounds from the headspace of yellow-orange exocarp coffee berries (C. arabica).

#	RT [min]	RI	chemical name	rel. Int. ripe berries	rel. Int. green berries
1	5.57	763	Toluene	19	68
2	7.81	849	4-Hydroxy-4-methylpentane-2-one	3
3	8.22	865	Ethylbenzene	2	14
4	8.42	872	C2-Benzene	14	50
5	8.96	893	Styrene	29	16
6	9.02	896	C2-Benzene	tr	14
7	9.58	921	Anisol	8
8	10.12	947	Frontalin	tr
9	10.52	966	C3-Benzene	4	44
10	10.72	976	2-Methoxy-3-methylpyrazinea	tr
11	10.90	984	C3-Benzene	1
12	11.11	994	6-Methyl-5-heptene-2-onea	tr
13	11.15	996	C3-Benzene	7	43
14	11.37	1008	α-Phellandrene	5
15	11.62	1022	3-Ethyl-4-methylpentanola,b	tr
16	11.67	1024	m-Methylanisol	5	19
17	11.76	1029	p-Cymene	1	12
18	11.84	1034	β-Phellandrene	27	13
19	12.11	1050	1,6-Dioxaspiro[4.5]decaneb	1
20	12.25	1057	Methyl 3-ethyl-4-methylpentanoateb	34	51
21	12.34	1062	(5R,7S)-Conophthorin	100	65
22	12.63	1079	trans-Linalool oxide (furanoid)	13	5
23	12.79	1088	Chalcograna	2
24	12.85	1091	Chalcograna,b	tr
25	12.90	1094	cis-Linalool oxide (furanoid)	9	8
26	12.99	1099	3-(1-Methylethyl)-2-methoxypyrazine	1
27	13.08	1105	Linalool	3	3
28	13.21	1113	6-Ethenyldihydro-2,2,6-trimethyl-2H-pyran-3(4H)-one	7
I	13.35	1121	(E)-4,8-Dimethylnona-1,3,7-triene		35
29	13.61	1138	(5S,7S)-Conophthorinb	3
30	13.75	1147	1-Terpineol	21
31	13.99	1162	Isomenthone	1
32	14.26	1179	3-sec-Butyl-2-methoxypyrazine	2
33	14.38	1186	3-Isobutyl-(2-Methylpropyl-2-methoxypyrazine	12
34	14.49	1193	Naphthalene	6	100
35	14.51	1195	Dillether	5
II	14.64	1203	Methyl salicylate		15
III	14.80	1214	1-Methylethyl benzoate		15
36	17.49	1407	Sativenec	6
37	17.58	1414	Unknown sesquiterpene	10
38	17.80	1432	α-Cedrene	19	69
39	17.94	1442	Acora-3,5-dienec	11
40	18.34	1474	Prezizaenec	21	6
41	18.47	1485	β-Acoradienec	7
42	18.59	1493	α-Neocallitropsenec	45	34
43	18.86	1515	α-Muurolenec	19
44	19.03	1530	Unknown sesquiterpene	2
45	19.15	1539	δ-Cadinenec	3
IV	19.73	1587	(E)-Dendrolasin		21
46	20.87	1687	Oxygenated sesquiterpene	19
47	21.18	1715	Oxygenated sesquiterpene	59
48	23.76	1964	Hexadecanoic acid	3	7
V	24.39	2029	1-Methylethyl hexadecanoate		22
49	24.86	2079	Kaurene	4	24

^arel. Integ below 0.05.

^bsynthesized in Hamburg.

^csesquiterpene, tentative structure.

tr trace.

c contaminant.