Conivaptan Impurity G Catalogue K545657 CAS 168626-93-5 M.W 499.57 M.F C32H25N3O3 Specifications FAQs N-(4-(2-methyl-5,6-dihydro-4H-benzo[b]oxazolo[5,4-d]azepine-6-carbonyl)phenyl)-[1,1'-biphenyl]-2-carboxamide