InChI=1/C21H22O9/c22-13-4-1-11-7-12(9-28-15(11)8-13)10-2-5-14(6-3-10)29-21-18(25)16(23)17(24)19(30-21)20(26)27/h1-6,8,12,16-19,21-25H,7,9H2,(H,26,27)/t12-,16+,17+,18-,19+,21-/s2