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