Gas chromatographic and mass spectrometric data on eight known pyridine-3-c
arboxylate alkaloids of betel nut (Areca catechu) have been standardised an
d applied to the characterisation of a further 16 basic compounds extracted
in low concentrations. Nine groups of compounds have been recognised and h
omologues allocated to these groups on the evidence derived from their elec
tron ionisation mass spectra and gas chromatographic retention times.