InChI=1S/C26H48O8/c27-19-17-15-13-11-9-7-5-3-1-2-4-6-8-10-12-14-16-18-20-33-26-23(30)21(28)22(29)24(34-26)25(31)32/h2,4,21-24,26-30H,1,3,5-20H2,(H,31,32)/b4-2+