InChI=1S/C19H18O9/c1-10-8-14(27-16(23)7-6-15(21)22)11-4-2-3-5-12(11)18(10)28-17(24)9-13(20)19(25)26/h2-5,8,13,20H,6-7,9H2,1H3,(H,21,22)(H,25,26)