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1.Polygonum cuspidatum P.E 2.Resveratrol 20%-98% 3.10 yrs experiences factory 4.HPLC test 5.Free sample, prompt delivery 100% Natural Polygonum cuspidatum P.E Resveratrol Product Name: Polygonum Cuspidatum extract powderBotanical Name:Polygonum CuspidatumPart Used: Root...........................................................Active Ingredient: ResveratrolCAS No.:501-36-0Structural formula:100% ...