In addition to crinamine, bulbispermine, 3-O-acetyl hamayne and 6-hydroxycr
inamine, three new alkaloids 8 alpha-ethoxy precriwelline, N-desmethyl 8 al
pha-ethoxy pretazettine and N-desmethyl-8 beta-ethoxy pretazettine were iso
lated from Crinum bulbispermum. The structures of the new alkaloids were es
tablished by specroscopic techniques. (C) 1999 Published by Elsevier Scienc
e Ltd. All rights reserved.