rac-1-[6-Hy­droxy-4-(4-meth­oxy­phen­yl)-3,6-dimethyl-4,5,6,7-tetra­hydro-2H-indazol-5-yl]ethanone

The title compound, C₁₈H₂₂N₂O₃, represents a (4S,5R,6S)-stereoisomer, crystallizing as a racemate in a centrosymmetric space group. The six-membered aliphatic ring adopts a half-chair conformation, with the hy­droxy- and acetyl-substituted C atoms deviating by 0.458 (2) and −0.366 (2) Å, respectively, from the plane defined by other four ring atoms. The pyrazole ring is essentially planar [r.m.s deviation = 0.004 (2) Å]. In the crystal, the mol­ecules are linked into chains along the b axis by N—H...N hydrogen bonds. The chains are linked by O—H...N hydrogen bonds into layers parallel to the bc plane.