2,3,4,9-Tetrahydro-2-methyl-1H-dibenzo(3,4:6,7)cyclohepta(1,2-c)pyridyl maleate;2-methyl-2,3,4,9-tetrahydro-1H-dibenzo[3,4:6,7]cyclohepta[1,2-c]pyridine (2Z)-but-2-enedioate
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