InChI=1S/C20H28O5/c1-11(2)13-10-12-6-9-20(25)18(3,4)7-5-8-19(20,17(23)24)14(12)16(22)15(13)21/h10-11,21-22,25H,5-9H2,1-4H3,(H,23,24)/t19-,20?/m1/s1