InChI=1S/C27H38O8/c1-2-3-9-15-20(28)16-11-8-6-4-5-7-10-13-19-14-12-17-21(18-19)34-27-24(31)22(29)23(30)25(35-27)26(32)33/h2,9,11-12,14-18,20,22-25,27-31H,1,3-8,10,13H2,(H,32,33)/b15-9+,16-11+