Resveratrol Polygonum cuspidatum extract more than 98% natural (excluding synthetic) white powder English name: Resveratrol, 3,4 ', 5-Trihydroxy-trans-stilbene Plant Source: Polygonaceae polygonaceae shrubby perennial herb knotweed Polygonum cuspidatum . sieb.et zucc dry roots; Liliaceae hairy leaves hellebore Veratrum grandiflorum Synonyms: Qi three phenol, 3,5,4'- trihydroxy stilbene, (E) -5- [2- (4- hydroxyphenyl) - vinyl] -1,3-hydroquinone formula: C14H12O3 Molecular Weight: 228.24 Molecular Structure: content: more than 98% CAS Registry Number: 501-36-0 melting point and solubility: 253-255 ° C 1, main components: C. quinoa resveratrol (resveratol) 2, using part: rhizome part 3, color: white fine powder 4. Mesh: 100% 80 mesh 5. Smell: special smell 6. Loss on drying: ≤5% 7, Ash: <5 % 8, heavy metals: <10PPM 9, solvent residue: <0.05PPM 10, microbiological criteria 1, the total amount of bacteria: <1000CFU / gm Appearance: white powder