Ammonium N-(pyridin-2-ylmethyl)oxamate (AmPicOxam). synthesized from O-methyl-N-(pyridin-2-ylmethyl)oxamate. was spectroscopically and structurally characterized and assayed as a novel precursor for the protection and consolidation of carbonate stone substrates. An in-depth characterization of treated and untreated biomicritic limestone and white Carrara marble samples was carried out... https://parisnaturalfoodes.shop/product-category/5-htp-100mg/