InChI=1S/C23H36O4/c1-3-4-5-6-7-8-9-10-11-12-13-14-15-16-19-17-18-20(27-2)22(24)21(19)23(25)26/h8-9,17-18,24H,3-7,10-16H2,1-2H3,(H,25,26)/b9-8+