Table 1.

Volatiles in agarwood oil obtained by water soaking (control), L. acidophilus and S. cerevisiae culture supernatant incubations

No.	Compound	RI	% relative peak area
		RIcal	RIref	Water	L. acidophilus	S. cerevisiae
1	Furfural	835	828	–	–	5.21
2	Benzaldehyde	960	952	0.09	0.10	2.90
3	Phenyl acetaldehyde	1057	1049	0.91	1.29	10.32
4	Cuminaldehyde	1245	1238	0.20	0.56	0.19
5	trans-Cinnamaldehyde	1273	1267	–	1.47	2.21
6	Indole	1296	1290	–	0.09	–
7	E-Cinnamyl alcohol	1309	1303	–	0.29	–
8	p-Vinylguaiacol	1315	1309	4.20	4.02	4.06
9	E-Methyl cinnamate	1382	1376	0.18	0.18	1.29
10	E-Ethyl cinnamate	1385	1376	0.41	0.71	0.26
11	p-Vinylguaiacol	1406	1398	0.75	1.11	1.70
12	α-Elemene	1460	1456	0.21	0.18	0.14
13	α-Humulene	1460	1456	0.08	0.36	0.22
14	β-Agarofuran	1511	1516	15.13	16.25	12.63
15	β-Dihydroagarofuran	1528	1520	0.63	1.08	0.35
16	α-Bulnesene	1526	1521	0.19	0.21	0.19
17	β-Phenyl heptan-3-one	1832	1524	0.10	0.27	0.11
18	cis-Calamenene	1534	1529	0.11	0.12	0.00
19	α-Agarofuran	1545	1540	8.05	8.17	8.64
20	Nor-ketoagarofuran	1565	1555*	0.23	0.25	0.34
21	γ-Undecalactone	1575	1569	0.18	0.15	0.59
22	β-Caryophyllene alcohol	1578	1570	2.35	2.67	1.93
23	Caryophyllene oxide	1589	1582	1.41	0.06	–
24	Geranyl isovalerate	1612	1606	0.30	0.31	1.51
25	10-Epi-γ-eudesmol	1628	1622	2.16	2.24	0.29
26	Agarospirol	1638	1630	5.49	5.61	2.38
27	Epi-α-cadinol	1645	1638	0.26	0.44	0.00
28	β-Eudesmol	1655	1649	0.73	0.79	0.24
29	α-Cadinol	1658	1652	0.19	0.47	0.30
30	α-Eudesmol	1659	1652	10.28	10.31	7.17
31	Selin-11-en-4α-ol	1667	1658	1.04	1.10	0.52
32	Kusunol	1668	1650*	0.37	0.37	0.35
33	β-Bisabolol	1680	1674	0.27	0.31	0.34
34	5β,7βH,10α-eudesm-11-en-1α-ol	1693	1687	0.21	0.34	0.18
35	2Z,6Z-Farnesol	1704	1698	0.37	0.13	–
36	Cyperotundone	1705	1699	0.57	0.74	0.61
37	β-Sinensal	1706	1699	1.61	1.65	0.73
38	Acorenone B	1706	1700	1.94	1.98	1.65
39	5-Hydroxy-cis-calamenene	1718	1713	–	0.33	–
40	2E,6Z-Farnesol	1720	1714	0.36	0.39	–
41	E-Nerolidol acetate	1740	1735	0.18	0.49	0.20
42	Selina-3,11-dien-14-ol	1760	1753	0.31	0.25	–
43	Selina-4,11-dien-14-al	1764	1758	0.81	0.87	–
44	Cyclocolorenone	1768	1761	1.36	1.02	–
45	Guaia-1(10),11-dien-15-ol	1781	1770	0.44	0.19	1.03
46	β-Eudesmol acetate	1790	1784	0.24	0.17	0.25
47	α-Bisabolol acetate	1804	1798	0.25	0.16	0.17
48	Nootkatone	1812	1806	0.24	0.25	–
49	Karanone	1818	1812*	9.47	9.63	7.64
50	Oxo-agarospirol	1828	1822*	2.91	2.02	2.16
51	Isoamyl dodecanoate	1873	1869	5.25	5.84	4.64
52	Spathulenol	1896	1890	0.05	0.36	0.22

RI Retention indices using a HP-5 ms column, RI_cal retention index calculated from retention time, all compounds have matching score ≥ 80% when compared to the NIST mass spectrum database. RI_ref retention index on HP-5 ms column from references [25, 27, 28]

*Retention indices using a DB-1 column; –, not detected