chemical formula c21h30o2 cannabidiol cbd phytocannabinoid marijuana pot grass hemp cannabis molecule icon in circle round black

chemical formula c21h30o2 cannabidiol cbd phytocannabinoid marijuana pot grass hemp cannabis molecule cannabinoid marihuana cannabinol cbn molecular structure chemistry medicine medical drug biochemistry compound science dronabinol tetrahydrocannabinol medicinal psychoactive ganja icon circle round black color vector illustration image solid outline isolated