InChI=1S/C22H22O8/c1-30-18-12-15(4-9-17(18)25)6-11-20(27)22(29,21(28)13-23)19(26)10-5-14-2-7-16(24)8-3-14/h2-12,21,23-25,28-29H,13H2,1H3/b10-5+,11-6+