4673-38-5

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