InChI=1S/C16H17NO9/c18-9-10(19)13(15(23)24)26-16(11(9)20)25-12(14(21)22)7-5-17-8-4-2-1-3-6(7)8/h1-5,9-13,16-20H,(H,21,22)(H,23,24)