Abstract
Three new carbazole alkaloids, 3-formyl-6-methoxycarbazole, methyl 6-methoxycarbazole-3-carboxylate and 3-formyl-1,6-dimethoxycarbazole and two carbazole derivatives, 3-formyl carbazole and methyl carbazole-3-carboxylate, reported for the first time from Nature, have been isolated from the root of
Clausena lansium along with three previously reported carbazole alkaloids, murrayanine, glycozoline and indizoline. All isolated compounds except glycozoline have a carbonyl group at C-3 with different substitution patterns at C-1, C-2 and C-6.