InChI=1S/C31H34O12/c1-14(2)4-7-18-21(33)10-6-16-12-20(30(40)42-27(16)18)17-9-11-22(19(23(17)34)8-5-15(3)13-32)41-31-26(37)24(35)25(36)28(43-31)29(38)39/h4-6,9-12,24-26,28,31-37H,7-8,13H2,1-3H3,(H,38,39)/b15-5+