InChI=1S/C20H19NO9/c1-7-6-10(22)21-12-11(7)13(23)8-4-2-3-5-9(8)17(12)29-20-16(26)14(24)15(25)18(30-20)19(27)28/h2-6,14-18,20,24-26H,1H3,(H,21,22)(H,27,28)