Chemistry, like all the natural sciences, begins with the direct observation of nature— in this case, of matter. 499-40-1, Name is (2R,3S,4R,5R)-2,3,4,5-Tetrahydroxy-6-(((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexanal, molecular formula is C12H22O11. In a Article，once mentioned of 499-40-1, Application of 499-40-1
A new complex of N-(pyridin-2-yl)pyridin-2-amine (NDPA) molecule, which is [C10H9N3]4AgNO3, has been synthesized for the first time and characterized by single-crystal X-ray diffraction, elemental analysis, Raman and infrared (at far and mid regions) spectroscopy. The complete vibrational frequencies, intensity of vibrational bands, optimized geometric structure, HOMO-LUMO energies, thermochemical properties and atomic charges for the compound were obtained by using density functional theory/B3LYP and LanL2DZ basis set. According to experimental results and theoretical calculations, the ligands are coordinated to the metal center in unidentate fashion.
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Reference：
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics