InChI=1S/C28H42O10/c1-2-3-4-5-6-10-15-19(29)16-11-8-7-9-13-18-14-12-17-20(21(18)26(33)34)37-28-24(32)22(30)23(31)25(38-28)27(35)36/h10,12,14-15,17,19,22-25,28-32H,2-9,11,13,16H2,1H3,(H,33,34)(H,35,36)/b15-10+