Compound 12d

(3R,4S,7S,10S)-10-(4-(tert-Butoxy)benzyl)-4-((R)-1-((S)-2-((tert-butoxycarbonyl)amino)-3-carboxypropanoyl)pyrrolidine-2-carboxamido)-3-methyl-5,8,11-trioxo-7-(2-oxo-2-(tritylamino)ethyl)-1-phenyl-2-oxa-6,9,12-triazatetradecan-14-oic acid

From: Combinatorial evolution of site- and enantioselective catalysts for polyene epoxidation