InChI=1S/C21H20O14S/c22-3-4-31-15-7-11(1-2-14(15)32-5-6-34-36(28,29)30)21-20(27)19(26)18-13(23)8-12(9-16(18)35-21)33-10-17(24)25/h1-2,7-9,22-23,27H,3-6,10H2,(H,24,25)(H,28,29,30)