InChI=1S/C27H38O8/c1-2-12-20-21(34-20)16-10-8-6-4-3-5-7-9-13-18-14-11-15-19(17-18)33-27-24(30)22(28)23(29)25(35-27)26(31)32/h2,8,10-11,14-15,17,20-25,27-30H,1,3-7,9,12-13,16H2,(H,31,32)/b10-8+