Ethyl N-[4-(3-methyl-4,5-dihydro­benzo[g]indazol-1-yl)phenyl­sulfon­yl]thio­carbam­ate ethanol monosolvate

The title compound, C(21)H(20)N(3)O(3)S(2)·CH(3)CH(2)OH, comprises two independent organic mol­ecules and two ethanol solvent mol­ecules. The mol­ecules are related by pseudo-mirror symmetry. In both mol­ecules, the N-bound benzene ring is twisted out of the plane of the pyrazole ring [the dihedral angles are 51.4 (3) and 44.1 (3)°, respectively]. Similarly, the benzene ring of the 1,2-dihydro­naphthalene residue is inclined with respect to the five-membered ring [dihedral angles 18.3 (3) and 22.2 (3)°]. Overall, each mol­ecule has a flattened U shape. Dimeric aggregates mediated by O—H⋯N(pyrazole) and amide-N—H⋯O hydrogen bonds feature in the crystal packing, whereby the ethanol mol­ecules link the independent organic mol­ecules, leading to four-mol­ecule aggregates.