50450-96-9;AC1LASEA;NSC 192996;Ethyl 5-hydroxy-3-(hydroxy(oxido)amino)-7-methoxy-1H-5.lambda.~5~-pyrrolo[2,3-d]pyridazine-2-carboxylate;Ethyl 5-hydroxy-3-(hydroxy(oxido)amino)-7-methoxy-1H-5lambda(5)-pyrrolo(2,3-d)pyridazine-2-carboxylate;ethyl 5-hydroxy-3-[hydroxy(oxido)amino]-7-methoxy-1,6-dihydropyrrolo[2,3-d]pyridazine-2-carboxylate
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