34144-73-5 BRN 0405778 Formamide, N-(10,11-dihydro-5H-benzo(4,5)cyclohepta(1,2-b)pyridin-5-yl)- N-(10,11-Dihydro-5H-benzo(4,5)cyclohepta(1,2-b)pyrid-5-yl)formamide