InChI=1S/C16H18O8/c17-10-3-1-2-9(6-10)4-5-13(19)24-12-8-16(23,15(21)22)7-11(18)14(12)20/h1-6,11-12,14,17-18,20,23H,7-8H2,(H,21,22)/b5-4+/t11-,12-,14-,16+/m0/s1