InChI=1S/C20H22O11S/c21-10-16-17(23)18(24)19(25)20(30-16)29-14-7-12(8-15(9-14)31-32(26,27)28)2-1-11-3-5-13(22)6-4-11/h1-9,16-25H,10H2,(H,26,27,28)/b2-1+/t16-,17-,18+,19-,20-/m1/s1