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

(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]-4-(2-acetyloxyethyl)-2-(tert-butyldimethylsilyloxymethyl)-2,3-dihydropyrrole