InChI=1S/C20H22O4/c1-10-16(22)8-11-4-5-13-12(6-7-15(21)18(13)23)14-9-20(2,3)24-19(10)17(11)14/h6-8,14,21-23H,4-5,9H2,1-3H3/t14-/m1/s1