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Table 1 Oil composition (%) of Piper aequale

From: Composition and cytotoxic and antioxidant activities of the oil of Piper aequale Vahl

No. Constituents RIa RIb Oil %
01 α-Pinene 937 932 12.6
02 β-Pinene 980 974 15.6
03 Limonene 1031 1024 1.0
04 δ-Elemene 1333 1335 19.0
05 α-Cubebene 1345 1345 0.6
06 α-Ylangene 1365 1373 0.6
07 α-Copaene 1373 1374 0.9
08 β-Elemene 1382 1389 2.6
09 α-Gurjunene 1400 1409 0.1
10 β-Caryophyllene 1415 1417 1.3
11 β-Ylangene 1417 1419 0.4
12 γ-Elemene 1426 1434 1.6
13 Aromadendrene 1434 1439 0.1
14 cis-Muurola-3,5-diene 1445 1451 0.4
15 α-Humulene 1452 1452 0.7
16 allo-Aromadendrene 1456 1458 0.3
17 Iswharane 1464 1465 0.7
18 cis-Muurola-4(14),5-diene 1465 1465 0.6
19 Germacrene D 1477 1484 3.5
20 β-Selinene 1485 1489 0.2
21 trans-Muurola-4(14),5-diene 1487 1493 0.4
22 Bicyclogermacrene 1492 1500 5.5
23 α-Muurolene 1495 1500 0.7
24 Cubebol 1511 1514 7.2
25 δ-Cadinene 1515 1522 2.3
26 trans-Cadina-1,4-diene 1529 1533 0.2
27 α-Cadinene 1532 1537 0.1
28 Elemol 1545 1548 1.4
29 Germacrene B 1553 1559 0.1
30 Guaiol 1592 1600 0.9
31 β-Atlantol 1604 1608 5.9
32 epi-α-Muurolol 1639 1640 2.1
33 α-Muurolol 1642 1644 0.9
34 α-Cadinol 1650 1652 2.0
35 Selin-11-en-4-α-ol 1651 1658 0.1
36 Bulnesol 1662 1670 0.4
Monoterpene hydrocarbons 29.2
Sesquiterpenes hydrocarbons 42.9
Oxygenated sesquiterpenes 20.9
Total 93.0
  1. aRetention indices calculated for all volatile constituents using a homologous series of n-alkanes
  2. bRetention indices described in literature (Adams, 2007 [20])
  3. The bold numbers represent the compounds with area percentage above 5%