CN1C(N)=NC(=O)/C1=C/C1Cn2cnc(=O)c3[nH]c(=O)n(c32)C1 10-[(Z)-(2-amino-3-methyl-5-oxoimidazol-4-ylidene)methyl]-1,3,6,8-tetrazatricyclo[6.3.1.04,12]dodeca-4(12),6-diene-2,5-dione