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 animationbengal.com 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 here 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.