InChI=1S/C27H28O13/c1-10(8-28)4-5-13-12(3)22-17(37-23-14(9-29)15(30)6-11(2)18(23)26(36)39-22)7-16(13)38-27-21(33)19(31)20(32)24(40-27)25(34)35/h4,6-7,9,19-21,24,27-28,30-33H,5,8H2,1-3H3,(H,34,35)/b10-4+