coumarin herbal fragrant molecule. responsible for the scent new-mown hay. skeletal formula.

coumarin molecule formula skeletal chemical 1benzopyran2one 2hchromen2one anticoagulant aromatic atomic atoms bean benzopyrone c9h6o2 carbon chemistry clover composition compound coumarine cumarin drawing flat grass hay herbal hydrogen hydroxycoumarin icon line molecular odor organic oxygen perfume plant science scientific structure sweet tonka vector woodruff newmown