(1S,2R,6R,7aS)-1,2,6-Trihydroxyhexahydro-1H-pyrrolizin-3-one

In the title compound, C7H11NO4, prepared via a Morita–Baylis–Hillman adduct, the five-membered ring bearing three O atoms approximates to a twisted conformation, whereas the other ring is close to an envelope, with a C atom in the flap position. The dihedral angle between their mean planes (all atoms) is 23.11 (9)°. The new stereocenters are created in a trans-diaxial configuration. In the crystal, O—H...O and O—H...(O,O) hydrogen bonds link the molecules, generating a three-dimensional network. A weak C—H...O interaction also occurs.