Vildagliptin Impurity B Catalogue V670342 CAS 1036959-23-5 (base) M.W MW: 476.01 M.F C24H34ClN5O3 Specifications FAQs (2S,2'S)-1,1'-[[(3-Hydroxytricyclo[3.3.1.1(3,7)]dec-1-yl)imino]bis(1-oxo-2,1-ethanediyl)]di(2-pyrrolidinecarbonitrile) hydrochloride