InChI=1S/C25H38O3/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-23(26)18-22-19-24(27)21-25(28)20-22/h6-7,9-10,19-21,27-28H,2-5,8,11-18H2,1H3/b7-6+,10-9+