Olanzapine thiolactam impurity1017241-36-9100 % similar 4-(2-Methylphenyl)-6-(4-methyl-1-piperazinyl)-3-pyridinecarboxamide342417-01-032 % similar [2-(4-Methylpiperazin-1-yl)phenyl]methanol123987-12-231 % similar Emedastine difumarate87233-62-331 % similar 3-(4-Methyl-1-piperazinyl)benzoic acid215309-01-630 % similar