Qadir S, Zaman Khan K, Jan A. Reaction of Dimethyl Sulfoxide-Acetic Anhydride with 4-Hydroxy-coumarin and Its Derivatives Under Microwave Conditions. ajc [Internet]. 2013 Jan. 8 [cited 2024 Nov. 26];25(6):3019-22. Available from: https://asianpubs.org/index.php/ajchem/article/view/25_6_19