Table 2. Main gland volatiles identified by GC-MS.
Retention indices | Compound name | CAS-Number | MW | Comment |
1011/1018 | methyl-1,4-benzoquinone | 000553-97-9 | 122.04 | |
1098/1109 | ethyl-1,4-benzoquinone | 004754-26-1 | 136.05 | |
1350/1367 | methyl-1,4-hydroquinone | 000095-71-6 | 124.05 | |
1432 | ethyl-1,4-hydroquinone | 2349-70-4 | 138.07 | |
1477 | 1,6-pentadecadiene | 58045-15-1 | 208.38 | a, low peak |
1492 | 1-pentadecene | 013360-61-7 | 210.24 | |
1552 | 1,2-dimethoxy-4-n-propylbenzene | 005888-52-8 | 180.12 | b, low peak |
1593 | 1-hexadecene | 000629-73-2 | 224.25 | low peak |
1663/1672 | 1,8-heptadecadiene | Not available | 236.25 | a |
1693 | 1-heptadecene | 006765-39-5 | 238.27 |
a: based on previous data [21], the positions of the double bonds (especially the second one) need to be confirmed; b: based on PBM (probability-based matching algorithm) database searching result (matching quality 86%). The data refer to both prothoracic and abdominal glands from wild-type adult beetles at stage A10.