InChI=1S/C19H21N7O7/c20-19(21)26-15-14(18(32)33)24-11(8-23-15)7-22-10-3-1-9(2-4-10)16(29)25-12(17(30)31)5-6-13(27)28/h1-4,8,12,22H,5-7H2,(H,25,29)(H,27,28)(H,30,31)(H,32,33)(H4,20,21,23,26)