2,6-Dimethyl-4-oxo-3-oxatri­cyclo­[5.2.1.0^2,6]decane-1-carboxamide

In the title compound, C₁₂H₁₇NO₃, which was synthesized by Wagner–Meerwein rearrangement of the N-nitro­imine, the ring-junction C—C bond length is comparatively long [1.573 (2) Å] due to a steric repulsion between the methyl groups at these atoms, which also leads to an increase in the C—C—C angles along this C₄ chain [118.10 (13) and 115.04 (15) °, respectively]. In the crystal, N—H...O—C and N—H...O=C hydrogen bonds are formed between the amide group and the two O-atom acceptors of the lactone group, forming a chain along [001].