Two new carbazole alkaloids designated as koenigine-quinone A and koen
igine-quinone B were isolated from the alcoholic extract of the stem b
ark of Murraya koenigii and their structures were established as 7-met
hoxy-3-methylcarbazole-1,4-quinone and 6,7-dimethoxy-3-methylcarbazole
-1,4-quinone, respectively, from spectral data and synthetic evidences
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