(S)-N-Benzyl-2-methyl-1,2,3,4-tetrahydroisoquinoline-3-carboxamide

The structure of the title compound, C18H20N2O, at 173 K has hexagonal (P61) symmetry. The N-containing six-membered ring assumes a half-chair conformation. In the crystal, intermolecular N—H...O hydrogen bonding via the amide groups cross-link the molecules along the a axis. The absolute configuration was confirmed by 2D NMR studies.