Carfilzomib Impurity 73

Chemical Name: (4S,7S,10S,13S,15R)-10-benzyl-15-hydroxy-7,13-diisobutyl-15-methyl-1-morpholino-2,5,8,11,14-pentaoxo-4-phenethyl-3,6,9,12-tetraazahexadecan-16-yl methanesulfonate

Synonym: 1-(3-Buten-1-yl)-4-(2,3-dichlorophenyl)-piperazine;