4H-1-benzopyran-4-one, 7-hydroxy-8-methyl-3-(3-thienyl)- 7-hydroxy-8-methyl-3-(3-thienyl)-4H-chromen-4-one InChI=1/C14H10O3S/c1-8-12(15)3-2-10-13(16)11(6-17-14(8)10)9-4-5-18-7-9/h2-7,15H,1H