(3a R ,8a S ,9 S ,9a R )-9-Hydroxyperhydrofuro[3,2- f ]indolizin-6-one

In the title compound, C10H15NO3, the central six-membered ring of the indolizine system adopts a chair conformation, while the oxopyrrolidine and hydrofuran rings attached to the indolizine ring system have envelope conformations. In the crystal, the molecules form chains parallel to the b axis via intermolecular O—H...O hydrogen bonds. The absolute configuration was assigned from the synthesis.