InChI=1S/C21H30O4/c1-15(2)8-7-13-24-20(22)18-11-4-5-12-19(18)21(23)25-17-10-6-9-16(3)14-17/h6,9-10,14-15,18-19H,4-5,7-8,11-13H2,1-3H3