6,7-Dimethoxy-2-methyl-3,4-dihydroisoquinolin-1(2H)-one

In the title compound, C12H15NO3, the iso­quinoline moiety is essentially planar, except for the N and adjacent Csp3 atoms, which deviate from the mean plane by 0.198 (2) and 0.686 (2) A, respectively. The bond length between the N and carbonyl C atoms [1.353 (3) A] is close to a double-bond value, indicating electron delocalization. No significant intermolecular interactions are observed.