InChI=1S/C21H26O5/c1-2-3-4-5-8-13-25-20(22)15-24-16-21(23)26-19-12-11-17-9-6-7-10-18(17)14-19/h6-7,9-12,14H,2-5,8,13,15-16H2,1H3