The structure of $C_{12}H_{15}N_3O_3$ has been determined by X-ray diffraction methods. The crystal system is monoclinic, space group $P2_1/c$, unit cell constants, a = 12.9955(9) ${AA}$, b = 7.7137(5) ${AA}$, c = 13.4699(11) ${AA}$, ${eta}$ = 107.86(1)$^{circ}$, V = 1285.2(1) ${AA}^3$, T = 296 K, Z = 4, $D_c$ = 1.350 $Mgm^{-3}$. The intensity data were collected on an Enraf-Nonius CAD-4 Diffractometer with graphite monochromated Mo $K{alpha}$ radiation (${lambda}$ = 1.71073 ${AA}$). The molecular structure was solved by direct methods and refined by full-matrix least squares to a final R = 4.19% for 1644 unique observed $F_0;>;4{sigma}(F_0)$ reflections 193 parameters.