InChI=1S/C26H42O4/c1-3-4-5-6-7-8-9-10-11-12-13-14-15-16-19-22-30-26(28)24-21-18-17-20-23(24)25(27)29-2/h17-18,20-21H,3-16,19,22H2,1-2H3