Table 2.
Gas chromatographic and mass spectral data to components for extracts of Oribotritia-species
| Peak no. | Retention time (min) | Diagnostic characters (mainly from EI-mass spectra) | Identified as |
|---|---|---|---|
| A | 10.92 | M+ at m/z 152, further diagnostic ions at m/z 69, m/z 41 | Neral |
| B | 11.32 | M+ at m/z 152, further diagnostic ions at m/z 69, m/z 41 | Geranial |
| C | 11.54 | M+ at m/z 182, series of CnH2n-1-ions | Tridecenea |
| D | 11.69 | M+ at m/z 184, series of CnH2n+1-ions | Tridecane |
| E | 13.32 | M+ at m/z 166 (1), 148 (7), 138 (14), 133 (2), 123 (10), 119 (4), 109 (40), 108 (46), 105 (15), 95 (15), 93 (11), 91 (20), 81 (100), 79 (69), 77 (31) | Epi-chrysomelidial (=3S,8R-chrysomelidial) |
| F | 13.36 | M+ at m/z 166 (7), 151 (6), 148 (46), 138 (25), 109 (49), 108 (40), 105 (30), 95 (19), 91 (27), 81 (100), 79 (78), 77 (38) | Chrysomelidial (=3S,8S-chrysomelidial) |
| G | 14.10 | M+ at m/z 210, series of CnH2n-1-ions | Pentadecenea |
| H | 14.32 | M+ at m/z 212, series of CnH2n+1-ions | Pentadecane |
| I | 16.36 | M+ at m/z 236; diagnostic ions from DMDS-derivatisation: M+ at m/z 362, further ions at m/z 231, 203, 183, 159, 155 (base peak) and m/z 131 | 6,9-heptadecadiene |
| J | 16.44 | M+ at m/z 238, series of CnH2n-1-ions | 8-heptadecene |
| K | 18.70 | M+ at m/z 272 (4), 257 (3), 229 (4), 203 (5), 187 (10), 161 (17), 133 (31), 120 (15), 119 (17), 107 (20), 93 (50), 81 (37), 69 (100), 55 (16), 53 (17), 41 (59) | β-springeneb |
| L | 19.27 | M+ at m/z 264 (11), 235 (3), 221 (4), 207 (4), 165 (4), 151 (7), 137 (10), 123 (10), 109 (22), 95 (61), 81 (61), 79 (52), 67 (100), 55 (38), 54 (32), 44 (32), 41 (69) | 9,17-octadecadienalc |
aDouble bond position not identified
bIdentified on the basis of mass spectral comparison with authentic spectrum
cTentatively identified on the basis of mass spectral data only (proposal from NIST-library)