(+)-1,1-dimethylethyl[[[4-(8-chloro-3,10-dibromo-6,11-dihydro-5H-benzo-[5,6]cyclohepta[1,2-b]pyridin-11(R)-yl)-1-piperidinyl]-carbonyl]-methyl]-1-piperidinecarboxylate

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

3,10-dibromo-8-chloro-11-(piperidin-4-yl)-6,11-dihydro-5H-benzo[5,6]cyclohepta[1,2-b]pyridine

4-[3,10-dibromo-8-chloro-5,6-dihydro-11H-benzo-[5,6]cyclohepta[1,2-b]pyridin-11-ylidene]-1-piperidine

4-[3,10-dibromo-8-chloro-5,6-dihydro-11H-benzo-[5,6]cyclohepta[1,2-b]pyridin-11-ylidene]-1-piperidinecarboxylic acid ethyl ester