... %, 50%, 98% and 99%Resveratrol [Out appearance]: Light yellow to white fine powder [Active ingredients]: emodin, chrysophanol, ... physcion-8-β-D-glucoside, resveratrol, polydatin, quercetin, polysaccharide ... investigation conducted in vivo and in vitro, resveratrol displayed chemopreventive effects at three critical stages of ...