Posaconazole Impurity 4 Catalogue B502554 CAS 2243786-01-6 M.W 513.64 M.F C30H35N5O3 Specifications FAQs 1-((2R,3R)-2-(benzyloxy)pentan-3-yl)-4-(4-(4-(4-hydroxyphenyl)piperazin-1-yl)phenyl)-1H-1,2,4-triazol-5(4H)-one