InChI=1S/C20H18O8/c21-19(22)13(5-11-1-3-15-17(7-11)27-9-25-15)14(20(23)24)6-12-2-4-16-18(8-12)28-10-26-16/h1-4,7-8,13-14H,5-6,9-10H2,(H,21,22)(H,23,24)/t13-,14-/m0/s1