Crystal structure of ethyl (4R)-2-amino-7-hy­droxy-4-phenyl-4H-chromene-3-carboxyl­ate

In the title compound, C(18)H(17)NO(4), the dihedral angle between the phenyl ring and the fused six-membered ring is 77.65 (4)°. The conformation of the mol­ecule is determined in part by an intra­molecular N—H⋯O hydrogen bond between the amino H atom and the carbonyl O atom, forming an S(6) motif. In the crystal, mol­ecules are linked into N—H⋯O hydrogen-bonded inversion dimers which are then connected into chains along [001], forming a two-dimensional network parallel to (100) via O—H⋯O hydrogen bonds. C—H⋯O interactions further contribute to the crystal stability. The ethyl group is disordered over two sets of sites in a 0.801 (5):0.199 (5) ratio.