BAY 63-2521 5MG. BAY 63-2521, CAS: 625115-55-1, MF: C20H19FN8O2, MW: 422. 42, Purity: greater than or equal to 98%, Appearance: Pale yellow solid, Synonym: Methyl (4, 6-diamino-2-(1-(2-fluorobenzyl)-1H-pyrazolo[3, 4-b]pyridin-3-yl)pyrimidin-5-yl)(methyl)carbamate Riociguat, Size: 5MG