3-((4-(8-chloro-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene)piperidin-1-yl)methyl)-5-methyl-1-((5-methylpyridin-3-yl)methyl)pyridin-1-ium; 3-((4-(8-Chloro-5H-benzo[5,6]cyclohepta[1,2-b]pyridin-11(6H)-ylidene)piperidin-1-yl)methyl)-5-methyl-1-((5-methylpyridin-3-yl)methyl)pyridin-1-ium; 3-[[4-(8-Chloro-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene)-1-piperidinyl]methyl]-5-methyl-1-[(5-methyl-3-pyridinyl)methyl]pyridinium