InChI=1S/C19H18O9/c20-10-11-9-14(27-17(25)7-5-15(21)22)12-3-1-2-4-13(12)19(11)28-18(26)8-6-16(23)24/h1-4,9,20H,5-8,10H2,(H,21,22)(H,23,24)