InChI=1S/C27H38O8/c1-2-13-20(28)16-11-9-7-5-3-4-6-8-10-14-19-15-12-17-21(18-19)34-27-24(31)22(29)23(30)25(35-27)26(32)33/h2,7,9,11-12,15-18,20,22-25,27-31H,1,3-6,8,10,13-14H2,(H,32,33)/b9-7+,16-11?