<chemical> A courmarin that is used as an anticoagulant. It has actions similar to those of warfarin. ... Pharmacological action: anticoagulant. ... Chemical name: 2H-1-Benzopyran-3-acetic acid, 4-hydroxy-alpha-(4-hydroxy-2-oxo-2H-1-benzopyran-3-yl)-2-oxo-, ethyl ester ... (12 Dec 1998) ...