Alogliptin 6-Chloro Impurity Catalogue A164504 CAS 865758-96-9 M.W 275.69 M.F C13H10CLN3O2 Specifications FAQs 2-[(6-Chloro-3,4-dihydro-3-methyl-2,4-dioxo-1(2H)-pyrimidinyl)methyl]-benzonitrile