3d image of coumarin skeletal formula

coumarin oil cassia polianthes tuberosa tuberose essential 2h-chromen-2-one 2h-1-benzopyran-2-one 1-benzopyran-2-one heterocycle lactone vanilla bitter sweet odor vitamin prescription drug warfarin anticoagulant blood clots deep vein thrombosis pulmonary embolism tonka beans perkin reaction synthesis lactonization biosynthesis cinnamon vanilla grass woodruff sweet-clover deertongue tilo mullein cherry blossom licorice 3d phytotherapy alternative medicine intermediate structure monoterpenoid phytoalexin parasympathomimetic cycle metabolism pathway formula flavone