Two isomeric reaction products: Hydrogen-bonded sheets in methyl 4-(5-amino-3-phenyl-1H-pyrazol-1-yl)-3-nitro-benzoate and hydrogen-bonded chains of edge-fused rings in methyl 3-nitro-4-[(5-phenyl-1H-pyrazol-3-yl)amino] benzoate

1. Portilla, J.
2. Mata, E.G.
3. Cobo, J.
4. Low, J.N.
5. Glidewell, C.