2-[(Z)-(5-chloro-2-oxo-1H-indol-3-ylidene)methyl]-5-(2-diethylaminoethyl)-3-methyl-6,7-dihydro-1H-pyrrolo[4,5-c]pyridin-4-one
2-[(Z)-(5-chloro-2-oxo-indolin-3-ylidene)methyl]-5-(2-diethylaminoethyl)-3-methyl-6,7-dihydro-1H-pyrrolo[4,5-c]pyridin-4-one
2-[(Z)-(5-chloro-2-oxo-3-indolinylidene)methyl]-5-(2-diethylaminoethyl)-3-methyl-6,7-dihydro-1H-pyrrolo[4,5-c]pyridin-4-one
2-[(Z)-(5-chloro-2-keto-indolin-3-ylidene)methyl]-5-(2-diethylaminoethyl)-3-methyl-6,7-dihydro-1H-pyrrolo[4,5-c]pyridin-4-one