Catsyn offer gram to tons of 6-(2,6-Dichlorophenyl)-8-methyl-2-[[3-(methylthio)phenyl]amino]pyrido[2,3-D]pyrimidin-7(8H)-one | CAS 260415-63-2, its formula is C21H16Cl2N4OS, molecular weight is 443.35g/mol and the purity is usually NLT 98%.