| C19H19N5O5·3.5H2O | Z = 8 |
| Mr = 460.45 | F(000) = 1944 |
| Monoclinic, C2/c | Dx = 1.385 Mg m−3 |
| a = 29.993 (4) Å | Mo Kα radiation, λ = 0.71073 Å |
| b = 7.9105 (6) Å | µ = 0.11 mm−1 |
| c = 21.458 (3) Å | T = 298 K |
| β = 119.860 (16)° | Block, clear colourless |
| V = 4415.3 (10) Å3 | 0.32 × 0.12 × 0.06 mm |