InChI=1S/C28H28O7/c1-2-21(17-9-5-3-6-10-17)22(18-11-7-4-8-12-18)19-13-15-20(16-14-19)34-28-25(31)23(29)24(30)26(35-28)27(32)33/h3-16,23-26,28-31H,2H2,1H3,(H,32,33)/b22-21-/t23-,24-,25+,26-,28?/m0/s1