2049024-22-6

(6S,9R,12S)-Benzyl 12-benzyl-9-isobutyl-2,2-dimethyl-4,7,10-trioxo-6-phenethyl-3-oxa-5,8,11-triazatridecan-13-oate is an impurity of Carfilzomib (C183460), a second-generation proteasome inhibitor that is used as a treatment in relapsed and refractory multiple myeloma.