InChI=1S/C26H40O13/c1-2-3-6-10-14(37-33)22-23(35-22)18-13(15-12-16(18)39-38-15)9-7-4-5-8-11-17(27)34-26-21(30)19(28)20(29)24(36-26)25(31)32/h4,7,13-16,18-24,26,28-30,33H,2-3,5-6,8-12H2,1H3,(H,31,32)/b7-4-