InChI=1S/C27H38O8/c1-2-3-15-20(28)16-11-9-7-5-4-6-8-10-13-19-14-12-17-21(18-19)34-27-24(31)22(29)23(30)25(35-27)26(32)33/h2-3,9,11-12,14-15,17-18,20,22-25,27-31H,1,4-8,10,13,16H2,(H,32,33)/b11-9+,15-3?