10-Deoxo-9,10-dehydro Ketotifen;4-(4H-Benzo[4,5]cyclohepta[1,2-b]thien-4-ylidene)-1-Methylpiperidine;Ketotifen FuMarate EP IMpurity A;4-benzo[1,2]cyclohepta[3,4-b]thiophen-10-ylidene-1-methylpiperidine;Ketotifen EP Impurity A;Ketotifen Impurity 1(Ketotifen EP Impurity A）;Piperidine, 4-(4H-benzo[4,5]cyclohepta[1,2-b]thien-4-ylidene)-1-methyl-;4-(4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-ylidene)-1-methylpiperidine
