InChI=1S/C20H22O6/c1-5-11(3)18(21)26-17-15-12(4)19(22)24-14(15)9-10(2)7-6-8-13-16(17)25-20(13)23/h5,8-9,14-17H,4,6-7H2,1-3H3/b10-9+,11-5-,13-8+/t14-,15+,16+,17+/m1/s1