Ethyl 5-amino-1-[(4-methyl­phen­yl)sulfon­yl]-1H-pyrazole-4-carboxyl­ate

In the title mol­ecule, C₁₃H₁₅N₃O₄S, the benzene and pyrazole rings are inclined to each other at 77.48 (3)°. Two amino H atoms are involved in bifurcated hydrogen bonds, viz. intra­molecular N—H...O and inter­molecular N—H...O(N). The inter­molecular hydrogen bonds link the mol­ecules related by translation in [100] into chains. A short distance of 3.680 (3) Å between the centroids of benzene and pyrazole rings from neighbouring mol­ecules shows the presence of π–π inter­actions, which link the hydrogen-bonded chains into layers parallel to the ab plane.