InChI=1S/C27H28O12/c1-35-20-9-13(4-7-17(20)29)3-6-16-11-15(28)12-19(37-16)14-5-8-18(21(10-14)36-2)38-27-24(32)22(30)23(31)25(39-27)26(33)34/h3-11,19,22-25,27,29-32H,12H2,1-2H3,(H,33,34)/b6-3+