DefinitionThis section has been translated automatically.
Glucoside of o-coumaric acid (bound coumarin), which occurs as a precursor of coumarin e.g. in Galium odoratum(woodruff) or also in sweet clover (Meliolotus officinalis). After enzymatic hydrolysis (e.g. during wilting), the genuinely present trans-coumaric acid is isomerized in UV light to cis-coumaric acid (coumaric acid), which is then transformed in cyclized form (lactonized) to coumarin. Only then does the aromatic odor typical of woodruff develop.