%0 Journal Article %T 5-Methyl-4-oxo-4,6-dihydro-3H-pyridazino[4,5-b]carbazole-1-carbonitrile %A Miriam Emich %A Norbert Haider %J Molbank %D 2010 %I MDPI AG %R 10.3390/M657 %X The title compound was prepared in excellent yield from 5-methyl-4-oxo-4,6-dihydro-3 H-pyridazino[4,5- b]carbazole-1-carbaldehyde by treatment with hydroxylamine hydrochloride in formic acid without isolation of the intermediate oxime. %U http://www.mdpi.com/1422-8599/2010/1/M657