6-Oxo-1,4,5,6-tetrahydropyridazin-3-carboxylic acid27372-38-9100 % similar 4,5-Dihydro-6-methyl-3(2H)-pyridazinone5157-08-445 % similar 3-tert-Butyl-4,5-dihydro-1H-pyrazol-5-one29211-68-534 % similar 3-Methyl-2-pyrazolin-5-one108-26-933 % similar Succinimide123-56-833 % similar 3-Propyl-1,4-dihydropyrazol-5-one29211-70-933 % similar 5-Amino-2,4-dihydro-3H-pyrazol-3-one6126-22-333 % similar Oxalic acid144-62-732 % similar 2-Azetidinone930-21-231 % similar Succinic dihydrazide4146-43-430 % similar