(S)-methyl 2-[2-(tert-butoxycarbonylamino)-3-(4-methoxy-1H-indol-3-yl)propanamido]acetate

tert-butyl (2S,4S)-4-allyl-2-{[(2S)-2-cyano-1-pyrrolidinyl]carbonyl}-1-pyrrolidinecarboxylate

(S)-dimethyl 2-(bis(tert-butoxycarbonyl)amino)pentanedioate

1-tert-butyl 2-methyl (2S,4S)-4-(2-methyl-2-propen-1-yl)-1,2-pyrrolidinedicarboxylate