InChI=1S/C20H28O6/c1-11-12(2)18(19(22)23)26-20(13(11)3)25-15-6-4-14(5-7-15)10-16-8-9-17(21)24-16/h4-7,11-13,16,18-20,22-23H,8-10H2,1-3H3