3-(4,9-dihydro-3H-β-carbolin-1-yl)-propionic acid methyl ester

4,5-dihydro-canthin-6-one

Nb-benzyl-1,2,3,3a,4,5-hexahydrocanthin-6-one

8-(2-chlorophenyl)-1,5-naphthyrid-2(1H)-one

5,6-dihydro-4H-indolo[3,2,1-de][1,5]naphthyridine