InChI=1S/C20H22O7/c1-25-17-8-11(3-5-15(17)22)7-13-14(10-21)19(27-20(13)24)12-4-6-16(23)18(9-12)26-2/h3-6,8-9,13-14,19,21-23H,7,10H2,1-2H3/t13-,14+,19-/m1/s1