InChI=1S/C21H30O4/c1-12(22)21(25)11-7-15-13-4-5-16-18(24)17(23)8-9-19(16,2)14(13)6-10-20(15,21)3/h13-15,24-25H,4-11H2,1-3H3/t13-,14+,15+,19-,20+,21+/m1/s1