InChI=1S/C21H22O8/c22-11-17-18(25)19(26)20(27)21(29-17)28-13-8-5-12(6-9-13)7-10-16(24)14-3-1-2-4-15(14)23/h1-10,17-23,25-27H,11H2/b10-7+/t17-,18-,19+,20-,21-/m1/s1