diethyl 13,14-diazatricyclo[6.4.1.12,7]tetradeca-3,5,9,11-tetraene-13,14-dicarboxylate

3-O-ethyl 7-O-methyl 3-benzazepine-3,7-dicarboxylate

3-O-ethyl 8-O-methyl 2,3-benzodiazepine-3,8-dicarboxylate

methyl 9-methylcarbazole-3-carboxylate

Methyl 2'-chloro-1,1'-biphenyl-4-carboxylate