3',6'-Bis(diethyl-amino)-2-(2-hydroxy-ethyl-amino)spiro-[isoindoline-1,9'-xanthen]-3-one.

In the title mol-ecule, C(30)H(36)N(4)O(3), the dihedral angle between the planes of the xanthene and spiro-lactam 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 mol-ecule may be influenced by two intra-molecular hydrogen bonds.