1. G.W.K. Cavill and E. Houghton, J. Insect Physiol.20, 2049 (1974).
2. Varian 1740 gas chromatograph, F.I.D. detector, helium as carrier gas, glass column (2 m×5 mm) packed with 3% OV1 on Gas Chrom Q (100/200 mesh).
3. AEI MS12 spectrometer, operating at 70 eV, ion source at 225°C, under GC-MS conditions.
4. Registry of Mass Spectral Data, p. 1415. Ed. E. Stenhagen, S. Abrahamson and F. W. McLafferty. Wiley, New York 1974.
5. G. Stanley and B.H. Kennett, J. Chromat.75, 304 (1973).