4-(8-chloro-3-bromo-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene)-1-piperidine-1-carboxylic acid ethyl ester

4-<3,7-dibromo-8-chloro-5,6-dihydro-11H-benzo-<5,6>cyclohepta<1,2-b>pyridin-11-ylidene>-1-piperidinecarboxylic acid ethyl ester

4-(9-amino-3,7-dibromo-8-chloro-5,6-dihydro-11H-benzo-<5,6>cyclohepta<1,2-b>pyridin-11-ylidene)-1-piperidinecarboxylic acid ethyl ester

4-(3,7-dibromo-8-chloro-5,6-dihydro-9-nitro-11H-benzo-<5,6>cyclohepta<1,2-b>pyridin-11-ylidene)-1-piperidinecarboxylic acid ethyl ester

3,7-Dibromo-8-chloro-6,11-dihydro-5H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ol