InChI=1S/C21H19N5O7/c22-13-12(19(23)32)16(29)15(18(31)17(13)30)24-9-6-7(4-5-10(9)27)20-25-14-8(21(33)26-20)2-1-3-11(14)28/h1-6,15,17-18,22,24,27-31H,(H2,23,32)(H,25,26,33)/t15-,17+,18+/m0/s1