9-methoxy-5-methyl-1-(4-nitro-phenyl)-3,4-dihydro-6H-pyrido[4,3-b]carbazole

1-Formyl-5-methyl-9-methoxy-6H-pyrido<4,3-b>carbazole

9-Methoxy-1-(4-methoxy-phenyl)-5,6-dimethyl-6H-pyrido[4,3-b]carbazole

9-methoxy-5-methyl-1-(4-methoxy-phenyl)-6H-pyrido[4,3-b]carbazole

5,6-dimethyl-9-hydroxy-1-(4'-hydroxyphenyl)-6H-pyrido[4,3-b]-carbazole