134749-40-9 2-(2-(Diethylamino)-6,7-dimethoxy-4-quinazolinyl)-N-methylhydrazinecarboxamide hydrate 6,7-Dimethoxy-4-(4'-methylsemicarbazido)-2-diethylaminoquinazoline hydrate Hydrazinecarboxamide, 2-(2-(diethylamino)-6,7-dimethoxy-4-quinazolinyl)-N-methyl-, hydrate