t-butyl 3-(3-allyloxy-3-oxopropyl)-5-[(4-ethyl-3-methyl-5-oxo-1H-pyrrol-2(5H)-ylidene)methyl]-4-methyl-1H-pyrrole-2-carboxylate

allyl (Z)-3-(2-ethyl-8-formyl-1,10-dimethyl-3-oxo-5,6-dihydro-3H-dipyrrolo[1,2-d:2',1'-g][1,4]diazepin-9-yl)propanoate

t-butyl (Z)-9-(3-allyloxy-3-oxopropyl)-2-ethyl-1,10-dimethyl-3-oxo-5,6-dihydro-3H-dipyrrolo[1,2-d:2',1'-g][1,4]diazepine-8-carboxylate

allyl 3-{(Z)-2-{[(Z)-2-(3-allyloxy-3-oxopropyl)-9-ethyl-1,10-dimethyl-8-oxo-5,6-dihydro-8H-dipyrrolo[1,2-d:2',1'-g][1,4]diazepin-3-yl]methylene}-4-methyl-5-[(Z)-(4-methyl-5-oxo-3-vinyl-1H-pyrrol-2(5H)-ylidene)methyl]-2H-pyrrol-3-yl}propanoate