. . . . . . . . . "Shinsuke Shirakawa, Kazunori Kanda, Mitsuo Yamada, Kei Aoki, Satoshi Urano, Nobuaki Tomita, \"Compound containing an oxamic acid group, a process for producing the compound, and a resin composition containing the compound.\" U.S. Patent US5663262, issued August, 1987."@en . . . . . "Oxamic Acid"@en . . . . . . . . . . . . "Amino-substituted glyoxylic acid derivative. [PubChem]"@en . . . . . "471-47-6"@en . . . . . . . . . . "experimental"@en .