LCZ696 Impurity 14 Catalogue L524684 CAS N/A M.W 453.57 M.F C27H35NO5 Specifications FAQs Ethyl (2R,4S)-4-([1,1'-biphenyl]-4-ylmethyl)-4-[4-(propan-2-yloxy)-4-oxobutanamido]-2-methylbutanoate