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.
gilvocarcin V [ 2064A,4-fucofuranose-1-hydroxy-10,12-dimethoxy-8-vinyl-6H-benz(d)naphtho(1,2b)pyran-6-one ] from Actinomycete DO-38; structure given in first source