2-(4-chloro-phen-yl)-5-(4-nitro-phen-yl)-4,7-dihydro-pyrazolo[1,5-a] pyrimi-dine-3,6-dicarbaldehyde: A chain of rings built from N - H⋯O and C - H⋯O hydrogen bonds

1. Trilleras, J.
2. Quiroga, J.
3. Low, J.N.
4. Cobo, J.
5. Glidewell, C.