Ki 8751 5MG. Ki 8751, CAS Number: 228559-41-9, Molecular Formula: C24H18F3N3O4, Molecular Weight: 469. 41, Purity: greater than or equal to 98% by HPLC, Appearance: Off-white solid, Synonym: N-(2, 4-Difluorophenyl)-N'-[4-[(6, 7-dimethoxy-4-quinolinyl)oxy]-2-fluorophenyl]urea, Size: 5MG