InChI=1S/C16H13NO11/c18-7-1-5(2-8(19)12(7)23)16(27)28-9-3-6(11(22)14(25)13(9)24)15(26)17-4-10(20)21/h1-3,18-19,22-25H,4H2,(H,17,26)(H,20,21)