InChI=1S/C22H22O10/c1-32-17-10-12(2-5-14(17)24)3-6-18(27)22(31,20(29)11-23)19(28)7-4-13-8-15(25)21(30)16(26)9-13/h2-10,20,23-26,29-31H,11H2,1H3/b6-3+,7-4+