SD208 5MG. SD208, A potent TGF-BR1 kinase inhibitor, CAS: 627536-09-8, Molecular Formula: C17H10ClFN6, Molecular Weight: 352. 75, Purity: greater than or equal to 98%, Appearance: Light brown solid, Synonym: 2-(5-Chloro-2-fluorophenyl)-4-[(4-pyridyl)amino]pteridine, Size: 5MG