Cbz-Pro-L-prolinal dimethyl acetal

(11aS)-benzyl 9-(benzyloxy)-11-hydroxy-5-oxo-2,3,11,11a-tetrahydro-1H-benzo[e]pyrrolo[1,2-a][1,4]diazepine-10(5H)-carboxylate

(S)-(2-amino-3-hydroxyphenyl)(2-(dimethoxymethyl)pyrrolidin-1-yl)methanone