Vildagliptin Impurity A Catalogue V670341 CAS 1036959-27-9 M.W MW: 303.4 M.F C17H25N3O2 Specifications FAQs (2R)-1-[2-[(3-Hydroxytricyclo[3.3.1.13,7]dec-1-yl)amino]acetyl]-2-pyrrolidine carbonitrile