Ammonium oxalate1113-38-831 % similar Acetylacetone123-54-631 % similar Ethanedioic acid hydrate (1:2)6153-56-631 % similar 5-Oxohexanoic acid3128-06-131 % similar 6-Oxoheptanoic acid3128-07-231 % similar 4-Hydroxy-2-butanone590-90-930 % similar Methacrylic acid79-41-430 % similar