Volatile compounds with variable importance in the projection (VIP) value more than 1.00^a.

Number	Compounds	VIP	Correlation
1	Naphthalene, 1,2,3,4-tetrahydro-1,6,8-trimethyl-	3.28	P
2	1,1,5-Trimethyl-1,2-dihydronaphthalene	2.96	P
3	Pentadecane	2.56	N
4	p-Xylene	2.52	P
5	Alpha.-methyl-.alpha.-[4-methyl-3-pentenyl]oxiranemethanol	2.49	P
6	Benzaldehyde, 3-benzyloxy-2-fluoro-4-methoxy-	2.49	N
7	Hydrazinecarboxylic acid, phenylmethyl ester	2.32	P
8	Ethinamate	2.29	N
9	Alpha.-acorenol	2.29	N
10	E-2-Hexenyl benzoate	2.28	N
11	Disulfide, di-tert-dodecyl	2.27	N
12	Bicyclo[3.1.1]hept-2-en-4-ol, 2,6,6-trimethyl-, acetate	2.21	P
13	(9-Oxabicyclo[3.3.1]non-6-en-3-yl)methanol	2.21	P
14	1-Methoxyadamantane	2.20	N
15	Phytol, acetate	2.19	P
16	3-Buten-2-one, 4-(2,6,6-trimethyl-2-cyclohexen-1-yl)-	2.19	N
17	R-Limonene	2.19	P
18	1,6-Octadien-3-ol, 3,7-dimethyl-	2.17	N
19	3-Buten-2-one, 4-(2,6,6-trimethyl-1-cyclohexen-1-yl)-	2.16	N
20	Heptadecane, 2,6,10,15-tetramethyl-	2.13	N
21	Hexanoic acid, 3-hexenyl ester, (Z)-	2.08	P
22	5-Ethyl-5-methyl-2-phenyl-2-oxazoline	1.97	N
23	1,2-Propanediol diformate	1.95	P
24	2H-Pyran-3-ol, 6-ethenyltetrahydro-2,2,6-trimethyl-	1.92	P
25	4-Epi-cubedol	1.92	N
26	4-(2,4,4-Trimethyl-cyclohexa-1,5-dienyl)-but-3-en-2-one	1.91	N
27	Terpinyl formate	1.87	P
28	1,6,10-Dodecatrien-3-ol, 3,7,11-trimethyl-	1.87	N
29	Benzenepropanoic acid, alpha.-(hydroxyimino)-	1.87	N
30	Formic acid, 3,7,11-trimethyl-1,6,10-dodecatrien-3-yl ester	1.84	P
31	Cyclopentanone, 2-cyclopentylidene-	1.77	N
32	Acetic acid, (1,2,3,4,5,6,7,8-octahydro-3,8,8-trimethylnaphth-2-yl)methyl ester	1.76	P
33	N-[3-[N-Aziridyl]propylidene]tetrahydrofurfurylamine	1.74	N
34	Cyclohexanol, 4-methyl-, trans-	1.74	P
35	Hexanoic acid, hexyl ester	1.74	P
36	2-Octen-1-ol, 3,7-dimethyl-, isobutyrate, (Z)-	1.71	N
37	[5,5-Dimethyl-6-(3-methyl-buta-1,3-dienyl)-7-oxa-bicyclo[4.1.0]hept-1-yl]-methanol	1.69	N
38	d-Limonene	1.69	N
39	2,5-Octadecadiynoic acid, methyl ester	1.69	N
40	1-Penten-3-one, 1-(2,6,6-trimethyl-1-cyclohexen-1-yl)-	1.65	P
41	10-Undecynoic acid, methyl ester	1.64	P
42	Phenol, 2,4,6-tris(1,1-dimethylethyl)-	1.59	N
43	1-Heptatriacotanol	1.57	N
44	Tetrapentacontane, 1,54-dibromo-	1.56	P
45	Hexanoic acid, 2-hexenyl ester, (E)-	1.54	P
46	Butanoic acid, 3-methyl-, 2-hexenyl ester, (E)-	1.53	N
47	Octadecanal, 2-bromo-	1.53	P
48	(3-Fluorophenyl) methanol, 3-methylbutyl ether	1.52	P
49	2,7-Octadiene-1,6-diol, 2,6-dimethyl-	1.52	N
50	7-Oxabicyclo[4.1.0]heptane, 1-methyl-4-(2-methyloxiranyl)-	1.52	N
51	E-10-Methyl-11-tetradecen-1-ol propionate	1.52	P
52	17-Octadecynoic acid	1.50	N
53	Cyclohexene, 1-(2-nitro-2-propenyl)-	1.50	P
54	Acetamide, N-(4,6,6-trimethylbicyclo[3.1.1]hept-3-en-2-yl)-, (1-alpha. 2-beta, 5-alpha)-	1.49	P
55	(2,2,6-Trimethyl-bicyclo[4.1.0]hept-1-yl)-methanol	1.48	P
56	10-Heptadecen-8-ynoic acid, methyl ester, (E)-	1.48	N
57	tert-Hexadecanethiol	1.46	P
58	Undec-10-ynoic acid	1.45	P
59	2,6-Octadiene-1,8-diol, 2,6-dimethyl-	1.44	P
60	Hexanal	1.44	P
61	Geranyl isovalerate	1.41	N
62	3-Isopropylidene-5-methyl-hex-4-en-2-one	1.37	N
63	2,4-Di-t-butyladamantane-2,4-diol	1.36	N
64	7-Propylidene-bicyclo[4.1.0]heptane	1.36	P
65	2,4-Nonadienal, (E,E)-	1.35	P
66	3,7-Octadiene-2,6-diol, 2,6-dimethyl-	1.35	N
67	(−)-Myrtenol	1.35	P
68	4-(2,5-Dihydro-3-methoxyphenyl)butylamine	1.35	N
69	2-Pentadecanone, 6,10,14-trimethyl-	1.34	P
70	N-Benzyl-2-aminocinnamate, methyl ester	1.34	N
71	2,2-Difluoroethanol, tert-butyldimethylsilyl ether	1.33	P
72	Fumaric acid, 2-methylcyclohex-1-enylmethyl pentadecyl ester	1.33	N
73	2,5-Dimethylcyclohexanol	1.32	N
74	3-Decanynoic acid	1.31	P
75	2,4-Heptadienal, (E,E)-	1.31	P
76	2(4H)-Benzofuranone, 5,6,7,7a-tetrahydro-4,4,7a-trimethyl-, (R)-	1.30	N
77	Dodecane, 2-methyl-	1.29	N
78	Benzaldehyde	1.29	N
79	1b,4a-Epoxy-2H-cyclopenta[3,4]cyclopropa[8,9]cycloundec[1,2-b]oxiren-5(1aH)-one, 2,7,9,10-tetrakis(acetyloxy)decahydro-3,6,8,8,10a-pentamethyl-	1.26	N
80	Pyrazine, 2-ethyl-3,5-dimethyl-	1.26	N
81	Butanoic acid, 2-methyl-, hexyl ester	1.26	N
82	Limonen-6-ol, pivalate	1.25	P
83	Oct-3-ene-1,5-diyne, 3-t-butyl-7,7-dimethyl-	1.23	N
84	Naphthalene, 1,2,3,5,6,8a-hexahydro-4,7-dimethyl-1-(1-methylethyl)-, (1S-cis)-	1.21	N
85	Tricyclo[2.2.1.0(2,6)]heptan-3-ol, 4,5,5-trimethyl-	1.16	N
86	7-Methyl-Z-tetradecen-1-ol acetate	1.16	N
87	Tricyclo[4.2.2.0(1,5)]decan-7-ol	1.14	P
88	1,5,5-Trimethyl-6-methylene-cyclohexene	1.12	N
89	Mesitylene	1.11	N
90	cis-3-Hexenyl-, alpha.-methylbutyrate	1.10	N
91	3-Cyclohexen-1-carboxaldehyde, 3,4-dimethyl-	1.10	N
92	2-Methyl-4-(2,6,6-trimethylcyclohex-2-enyl)but-3-en-2-ol	1.09	N
93	1,2-15,16-Diepoxyhexadecane	1.08	N
94	cis-, beta, -Farnesene	1.07	P
95	Naphthalene, 1,2-dihydro-1,1,6-trimethyl-	1.02	P
96	Caryophyllene	1.02	N
97	Cedrane, 8-propoxy-	1.02	P
98	Ethyl iso-allocholate	1.02	P
99	10-Hydroxy-2,4a,6a,6b,9,9,12a-heptamethyl-1,2,3,4,4a,5,6,6a,6b,7,8,8a,9,10,11,12,12a,12b,13,14b-eicosahydropicene-2-carboxylic acid	1.01	N

^aP: relative content of compound is positively correlated with roasting degree. N: relative content of compound is negatively correlated with roasting degree.