Apixaban Impurity I Catalogue A186739 CAS 1686149-74-5 M.W 473.53 M.F C26H27N5O4 Specifications FAQs 1-(4-methoxyphenyl)-6-(4-(5-methyl-2-oxopiperidin-1-yl)phenyl)-7-oxo-4,5,6,7-tetrahydro-1H-pyrazolo[3,4-c]pyridine-3-carboxamide