InChI=1S/C20H20O5/c1-9(2)14-16(21)12-8-13-15-10(7-11(12)17(22)18(14)23)5-4-6-20(15,3)19(24)25-13/h5,7-9,13,15,21H,4,6H2,1-3H3/t13-,15-,20-/m0/s1