InChI=1S/C20H28O5/c1-18-7-14(23)17(24)19(2,10-21)15(18)5-6-20(11-22)13-9-25-8-12(13)3-4-16(18)20/h8-9,15-17,21-22,24H,3-7,10-11H2,1-2H3