Product name : pterostilbene 99% Appearance : oof-white or white powder Cas no : 537-42-8 Molecular formula :c16h16o3 Molecular weight : 256.30 Synonyms: trans-pterostilbene ) What is a pterostilbene ? methylated resverstrol 1. Naturally found in small berries (blueberries , huckleberries , grapes ect .) 2. Phytoalexin( plant defense system );antifungal , antimicrobial . Pterostilbene vs. Resveratrol 1. More lipophilic than resveratrol (1)higher potential for cellular uptake 1. More bio-abailable than resveratrol (1) greatly improved in oral absorption (2) greater metabolic stability 2. Longer half-life in the body than resveratrol (1) resveratrol : ~14 minutes in blood . (2) pterostilbene ~105 minutes in blood .