InChI=1/C11H7ClN4O5/c12-7-2-1-5(16(20)21)3-6(7)9(17)14-8-4-13-11(19)15-10(8)18/h1-4H,(H,14,17)(H2,13,15,18,19)/f/h13-15H 5CB3FD82E7C8F62C