Table 5: Liquid chromatography-mass spectrometry data for cryptolepine and the proposed metabolites (adapted from Donkor [62]).

Metabolite/parent compoundRetention time (min)The proposed MH+ formulaMeasured

M112.9C22H21N2O6409.1394
M214.8C22H21N2O7425.1344
M314.8C16H15N2O2267.1129
M415.8C22H21N2O7425.1343
M517.1C16H15N2O3283.1078
M618.1C16H13N2O249.1023
M718.6C16H13N2O249.1022
M818.7C22H21N2O8441.1294
M919.2C22H21N2O8441.1292
Cryptolepine18.5C16H13N2233.1073