Definition: Synthetic or naturally occurring substances related to coumarin, the delta-lactone of coumarinic acid. The various coumarins have a wide range of proposed actions and uses including as ANTICOAGULANTS, pharmaceutical aids, indicators and reagents, photoreactive substances, and ANTINEOPLASTIC AGENTS.
osthol [ 7-methoxy-8-(3-methylpent-2-enyl)coumarin,osthole ] from Cnidium monnieri and Angelica pubescens (both Apiaceae); structure given in first source