Jumreang Tummatorn และ Sophon Roengsumran. (2008) Synthesis of 6-hydroxy-2,3,9-trimethoxy-[1]-benzopyrano [3,4-b] [1] benzopyran-12(6H)-one. Chulalongkorn University:ม.ป.ท.Jumreang Tummatorn และ Sophon Roengsumran. 2008. Synthesis of 6-hydroxy-2,3,9-trimethoxy-[1]-benzopyrano [3,4-b] [1] benzopyran-12(6H)-one. ม.ป.ท.:Chulalongkorn University;Jumreang Tummatorn และ Sophon Roengsumran. Synthesis of 6-hydroxy-2,3,9-trimethoxy-[1]-benzopyrano [3,4-b] [1] benzopyran-12(6H)-one. ม.ป.ท.:Chulalongkorn University, 2008. Print.