The title compound, C13H16N2O3, adopts an E configuration with respect to the C=N bond and an intra­molecular N—H⋯N hydrogen bond results in the formation of a six-membered ring. In the crystal, inter­molecular O—H⋯O hydrogen bonds link the mol­ecules into a chain propagating along the b axis. Very weak π–π stacking inter­actions [centroid–centroid distance = 4.18 (2) Å] may further consolidate the packing, forming a two-dimensional supra­molecular network.

In the title compound, C28H32N4O3, the dihedral angle between the planes of the xanthene ring system and the spiro­lactam ring is 85.99 (3)°. Mol­ecules are linked by inter­molecular O—H⋯O and N—H⋯O hydrogen-bonding inter­actions.

In the title mol­ecule, C30H36N4O3, the dihedral angle between the planes of the xanthene and spiro­lactam rings systems is 88.69 (4)°. Both C atoms of one of the ethyl groups are disordered over two sites with occupancies 0.72 (2)/0.28 (2). The conformation of the mol­ecule may be influenced by two intra­molecular hydrogen bonds.