Crystal structure of 2-[(1R,2R,4aS,8aS)-2-hy­droxy-2,5,5,8a-tetra­methyl­deca­hydro­naphthalen-1-yl]-N-(o-tol­yl)acetamide

The title compound, C(23)H(35)NO(2), is an amide derivative of the lactone (+)-sclareolide, and was synthesized from natural sclareol. In the mol­ecular structure, the two six-membered rings (A and B) of the labdane skeleton are trans-fused, and adopt chair conformations. There is an intra­molecular N—H⋯O hydrogen bond present forming an S(7) ring motif. In the crystal, O—H⋯O hydrogen bonds link the mol­ecules into helical chains propagating along the b-axis direction. The chains are linked via C—H⋯π inter­actions, forming a three-dimensional structure.