yohimbine molecular structure, 3d model molecule, quebrachine, structural chemical formula view from a microscope

yohimbine quebrachine a2adrenergic receptor antagonist indole alkaloid pausinystalia johimbe veterinary drug molecule molecular structure chemical formula 3d model c21h26n2o3 atom atomic blood chemistry herbal nutritional oxygen pressure recreational science carbon health hormone skeletal supplement dietary hydrogen stimulant aphrodisiac nitrogen food organic tree dysfunction erectile sedation laboratory