InChI=1S/C18H22O10/c1-26-11-5-9(6-12(27-2)16(11)22)3-4-14(20)28-13-8-18(25,17(23)24)7-10(19)15(13)21/h3-6,10,13,15,19,21-22,25H,7-8H2,1-2H3,(H,23,24)/b4-3+