Olanzapine EP Impurity C Catalogue A286233 CAS 719300-59-1 M.W 361.91 35.45 M.F C18H22ClN4S. Cl Specifications FAQs Synonyms:1-(chloromethyl)-1-methyl-4-(2-methyl-10H-benzo[b]thieno[2,3-e][1,4]diazepin-4-yl)piperazin-1-ium