Nin-L-benzyloxycarbonylleucyl-Na-2,2,2-trichloroethoxycarbonyl-D-tryptophan methyl ester

(9H-fluoren-9-yl)methyl (2R,2'S,4R,9a'S)-4-(2-aminobenzamido)-2'-isobutyl-3',5-dioxo-2',3',4,5-tetrahydro-3H-spiro[furan-2,9'-imidazo[1,2-a]indole]-1'(9a'H)-carboxylate