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