InChI=1S/C21H38O4/c1-3-4-13-21(2,25)14-10-12-18-17(19(23)16-20(18)24)11-8-6-5-7-9-15-22/h10,12,17-18,20,22,24-25H,3-9,11,13-16H2,1-2H3/b12-10+/t17-,18-,20-,21?/m1/s1