(11S,11aS)-2-(2-acetyloxyethyl)-10-allyloxycarbonyl-8-benzyloxy-11-hydroxy-7-methoxy-1,10,11,11a-tetrahydro-5H-pyrrolo[2,1-c][1,4]benzodiazepin-5-one

(2S)-N-[(2-allyloxycarbonylamino)-4-benzyloxy-5-methoxybenzoyl]-4-(2-acetyloxyethyl)-2-(hydroxymethyl)-2,3-dihydropyrrole

{5-Benzyloxy-2-[(S)-2-(tert-butyl-dimethyl-silanyloxymethyl)-4-oxo-pyrrolidine-1-carbonyl]-4-methoxy-phenyl}-carbamic acid allyl ester

(2S)-N-[(2-allyloxycarbonylamino)-4-benzyloxy-5-methoxybenzoyl]-2-(tert-butyldimethylsilyloxymethyl)-4-(2-hydroxyethyl)-2,3-dihydropyrrole

(2S)-N-[(2-allyloxycarbonylamino)-4-benzyloxy-5-methoxybenzoyl]-2-(tert-butyldimethylsilyloxymethyl)-4-(methoxycarbonylmethyl)-2,3-dihydropyrrole