InChI=1S/C20H26O5/c1-6-10(2)18(22)25-17-16-11(3)19(23)24-15(16)9-13-7-8-14(21)12(4)20(13,17)5/h6,12-13,15,17H,7-9H2,1-5H3/b10-6+