Table 1.
Volatile compounds identified in fresh and stored samples of essential oil from Croton rhamnifolioides.
| Component a | Fresh Oil [%] | LRI calc. b | Stored Oil [%] | LRI calc. b | LRI Lit. c | |
|---|---|---|---|---|---|---|
| Tricyclene | 0.16 | 921 | 0.52 | 920 | 920 | |
| α-Thujene | 1.49 | 924 | 2.17 | 926 | 926 | |
| α-Pinene | 4.74 | 932 | 9.52 | 932 | 932 | |
| Camphene | 0.65 | 946 | 2.4 | 946 | 946 | |
| Sabinene | 3.04 | 969 | 7.18 | 972 | 972 | |
| β-Pinene | 0.55 | 974 | 0.69 | 974 | 974 | |
| Myrcene | 0.36 | 988 | 0.68 | 991 | 991 | |
| α-Phellandrene | 12.83 | 1002 | 8.37 | 1003 | 1003 | |
| α-Terpinene | 0.31 | 1014 | - | - | 1016 | |
| o-Cymene | 4.60 | 1022 | 14.64 | 1023 | 1023 | |
| Sylvestrene | 3.62 | 1025 | 3.99 | 1028 | 1027 | |
| 1,8-Cineole | 7.24 | 1026 | 18.61 | 1030 | 1030 | |
| Benzyl alcohol | 0.20 | 1026 | - | - | 1033 | |
| (E)-β Ocimene | 0.75 | 1044 | 0.34 | 1049 | 1048 | |
| γ-Terpinene | 1.09 | 1054 | - | - | 1058 | |
| Terpinolene | 0.24 | 1086 | - | - | 1088 | |
| Linalool | 1.32 | 1095 | 1.27 | 1100 | 1100 | |
| Dehydro-sabina ketone | 0.16 | 1117 | - | - | 1120 | |
| (Z)-β-Terpineol | 0.08 | 1140 | - | - | 1139 | |
| Camphor | 0.06 | 1141 | 0.45 | 1144 | 1144 | |
| Pinocarvone | 0.02 | 1160 | - | - | 1162 | |
| Borneol | 0.83 | 1165 | - | - | 1165 | |
| Terpinen-4-ol | 1.90 | 1174 | 0.48 | 1177 | 1177 | |
| α-Terpineol | 1.91 | 1186 | 0.7 | 1190 | 1190 | |
| Myrtenol | 0.31 | 1194 | - | - | 1196 | |
| Methyl chavicol | 0.06 | 1195 | - | - | 1198 | |
| Thymol methyl ether | 0.03 | 1232 | - | - | 1235 | |
| Bornyl acetate | 0.33 | 1284 | 0.72 | 1287 | 1286 | |
| Thymol | 0.05 | 1289 | - | - | 1292 | |
| Carvacrol | 0.20 | 1298 | - | - | 1301 | |
| Myrtenyl acetate | 0.02 | 1324 | - | - | 1326 | |
| δ-Elemene | 0.03 | 1335 | - | - | 1338 | |
| α-Copaene | 0.19 | 1374 | 0.43 | 1378 | 1377 | |
| β-Bourbonene | 0.07 | 1387 | - | - | 1386 | |
| β-Elemene | 0.35 | 1389 | 1.36 | 1394 | 1393 | |
| (Z)-α-Bergamotene | 0.05 | 1411 | - | - | 1417 | |
| (E)-Caryophyllene | 6.33 | 1417 | 4.37 | 1422 | 1422 | |
| (E)α-Bergamotene | 0.14 | 1432 | - | - | 1438 | |
| (Z)-β-Farnesene | 0.04 | 1440 | - | - | 1445 | |
| α-Humulene | 1.17 | 1452 | 0.96 | 1456 | 1457 | |
| 9-epi-(E)-Caryophyllene | 0.80 | 1464 | 0.95 | 1464 | 1465 | |
| γ-Muurolene | 0.04 | 1478 | - | - | 1481 | |
| Germacrene D | 0.99 | 1484 | - | - | 1485 | |
| Viridiflorene | 0.14 | 1496 | 0.71 | 1489 | 1490 | |
| Bicyclogermacrene | 4.59 | 1500 | 2.44 | 1499 | 1501 | |
| (Z)-β-Guaiene | 0.10 | 1502 | - | - | 1504 | |
| α-Bulnesene | 0.05 | 1509 | - | - | 1506 | |
| Germacrene A | 0.21 | 1508 | 0.84 | 1508 | 1510 | |
| Sesquicineole | 16.79 | 1515 | 1.77 | 1516 | 1518 | |
| δ-Cadinene | 0.45 | 1522 | 0.44 | 1526 | 1527 | |
| Germacrene B | 0.06 | 1559 | - | - | 1556 | |
| Spathulenol | 4.14 | 1577 | 4.98 | 1580 | 1580 | |
| Caryophyllene oxide | 3.22 | 1582 | 2.89 | 1586 | 1586 | |
| Viridiflorol | 0.09 | 1592 | - | - | 1596 | |
| epi-α-Cadinol | 2.33 | 1638 | 3.16 | 1644 | 1643 | |
| α-Bisabolol | 0.72 | 1685 | - | - | 1685 | |
| Eudesma-4(15),7-dien-1β-ol | 0.23 | 1687 | - | - | 1688 | |
| Monoterpene hydrocarbons | 32.94 | 48.33 | ||||
| Oxygenated monoterpenes | 15.85 | 24.4 | ||||
| Sesquiterpene hydrocarbons | 15.75 | 12.5 | ||||
| Oxygenated sesquiterpenes | 27.52 | 12.8 | ||||
| Total | 92.47 | 98.03 | ||||
a Constituents listed in order of elution from a non-polar DB-5 capillary column; b Linear retention indices calculated from retention times in relation to those of a series of n-alkanes separated on a non-polar DB-5 capillary column; c Linear retention indices from the literature.