Table 1.
Composition in the leaf of five Bursera species.
| Compound | tR (min)a | ID b | Composition (%) c | ||||
|---|---|---|---|---|---|---|---|
| B. copallifera | B. excelsa | B. mirandae | B. ruticola | B. fagaroides var. purpusii | |||
| α-Thujene | 7.65 | 2 | 0.2 | – | – | 5.3 | – |
| α-Pinene | 7.81 | 1 | 0.7 | 1.6 | 6.6 | 10.3 | 67.8 |
| Camphene | 8.15 | 2 | – | – | – | 1.2 | 1.2 |
| Sabinene | 8.53 | 2 | – | – | – | 2.8 | 1.2 |
| β-Pinene | 8.65 | 1 | – | 4.7 | – | 21.9 | 5.7 |
| β-Myrcene | 8.76 | 1 | – | – | 0.5 | – | 2.0 |
| α-Phellandrene | 9.13 | 1 | 0.3 | 1.2 | 15.0 | – | – |
| p-Cymene | 9.44 | 1 | – | – | 0.6 | – | – |
| Limonene | 9.52 | 1 | – | – | – | 0.4 | 0.9 |
| β-Phellandrene | 9.56 | 1 | – | – | 1.9 | 2.0 | 0.2 |
| β-Ocimene | 9.75 | 1 | – | 4.9 | – | – | – |
| Sesquiterpene | 14.21 | 3 | – | 2.6 | – | – | – |
| α-Copaene | 14.80 | 1 | 1.7 | – | 2.7 | – | – |
| Sesquiterpene | 14.94 | 3 | 1.7 | 6.4 | 0.7 | 0.5 | – |
| β-Caryophyllene | 15.43 | 1 | 9.6 | 15.0 | 14.4 | 18.3 | 4.3 |
| α-Humulene | 15.88 | 1 | 12.5 | 0.7 | 0.5 | 0.6 | – |
| Sesquiterpene | 15.93 | 3 | 0.4 | – | 0.5 | – | – |
| Sesquiterpene | 16.05 | 3 | 1.5 | 0.7 | – | – | – |
| Germacrene D | 16.18 | 1 | 56.2 | 50.5 | 36.6 | 31.9 | 15.1 |
| Bicyclogermacrene | 16.36 | 2 | 6.2 | 8.8 | 1.2 | 0.7 | 0.8 |
| Sesquiterpene | 16.55 | 3 | 2.4 | – | – | 1.2 | – |
| Sesquiterpene | 16.57 | 3 | – | 1.5 | 2.7 | – | – |
| Sesquiterpene | 17.33 | 3 | 1.0 | 1.3 | – | 0.6 | – |
| Sesquiterpene | 18.06 | 3 | 1.4 | – | – | 0.5 | – |
| Sesquiterpene | 18.27 | 3 | – | – | – | 1.0 | – |
| Unknown | 25.95 | 4 | – | – | 2.6 | – | – |
| Unknown | 26.58 | 4 | – | – | – | 0.9 | – |
| Monoterpenes | 1.2 | 12.4 | 24.6 | 43.9 | 79.0 | ||
| Sesquiterpenes | 94.6 | 87.5 | 59.3 | 55.3 | 20.2 | ||
a Retention times are based on GC-FID analysis with DB-5MS capillary column; b Method of identification: 1, matching GC retention time and mass spectrum with an authentic standard; 2, mass spectral matching with a library spectrum; 3, interpretation of the mass spectrum; 4, unidentified; c Percentages are based on GC peak area. Percentages higher than 10% are bolded. –, Not detected.