coumarin, c9h6o2 molecule. it has sweet odor, recognised as scent of newly-mown hay. coumarinic compounds are a class of lactones

anticoagulant are atom atomic benzopyrone c9h6o2 cage carbon chemical chemistry class clover compounds coumarin coumarine coumarinic flat formula has hay herbal hydrogen hydroxycoumarin icon illustration lactone lactones molecular molecule newlymown notebook odor organic oxygen paper perfume recognised scent sheet structural structure sweet tonka vector woodruff