InChI=1S/C15H15NO11/c17-7-8(18)10(11(20)21)27-12(9(7)19)26-4-1-2-6-5(3-4)15(25,14(23)24)13(22)16-6/h1-3,7-10,12,17-19,25H,(H,16,22)(H,20,21)(H,23,24)