127913-88-6 3-Hydroxy-5-hydroxymethyl-2-methyl-4-formylpyridine thiosemicarbazonato-Cu(II) Copper, aqua(2-((3-hydroxy-5-(hydroxymethyl)-2-methyl-4-pyridinyl)methylene)hydrazinecarbothioamidato(2-))-, monohydrochloride Copper-thiosemicarbazone complex