PMC 3649683 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3649683/ http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3649683/ pterostilbene pterostilbene http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3649683/ PMC 3649683