1. The reaction of DMSO and acetic anhydride with 4-hydroxycoumarin and dicoumarol;Khan;J Chem Soc Perkin Trans-1,1983
2. Reaction of DMSO and acetic anhydride with 4-acyloxycoumarins;Ara;Synth Commun,2009
3. Reaction of DMSO and acetic anhydride with 3-substituted 4-hydroxycoumarin;Khan;Indian J Chem Sect B,1985
4. A convenient route for 3-formyl-4-hydroxycoumarin and reactions of 3-bromo-4-hydroxycoumarin;Rahman;Ind J Chem,1990
5. 4-hydroxycoumarin derivatives with anticoagulant activity. Condensation products of 4-hydroxycoumarin with halogen derivatives of aromatic aldehydes;Eckstein;Chem Abstract,1963