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(1982)(4-Nitro-phenoxy)-acetic acid [2-oxo-1-pyrrolidin-1-ylmethyl-1,2-dihydro-indol-(3Z)-ylidene]-hydrazide
(4-Nitro-phenoxy)-acetic acid [2-oxo-1-piperidin-1-ylmethyl-1,2-dihydro-indol-(3Z)-ylidene]-hydrazide
(4-Nitro-phenoxy)-acetic acid [1-morpholin-4-ylmethyl-2-oxo-1,2-dihydro-indol-(3Z)-ylidene]-hydrazide
(4-Nitro-phenoxy)-acetic acid [2-oxo-1-(4-p-tolyl-piperazin-1-ylmethyl)-1,2-dihydro-indol-(3Z)-ylidene]-hydrazide