Synonyms: 135472-91-2;BN 52256;BN-52256;AC1L2ZZB;10H-Benzo(4,5)cyclohepta(1,2-b)selenophen-10-one, 4,9-dihydro-4-(1-methyl-4-piperidinylidene)-;4,9-Dihydro-4-(1-methyl-4-piperidinylene)-1-hydroxybenzene-4,5-cyclohepta-1,2b-selenophen-10-one;4-(1-methylpiperidin-4-ylidene)-4,9-dihydro-10H-benzo[4,5]cyclohepta[1,2-b]selenophen-10-one