InChI=1S/C21H31O4/c1-12(22)21(25)9-7-16-14-5-4-13-10-17(23)18(24)11-19(13,2)15(14)6-8-20(16,21)3/h4,14-18,24-25H,5-11H2,1-3H3/t14?,15?,16?,17?,18?,19-,20-,21-/m0/s1