Ethyl (2,3,4)-1-ethyl-2-(furan-2-yl)-4-hy-droxy-5-oxopyrrolidine-3-carboxyl-ate.

The title racemic oxopyrrolidine compound, CHNO, contains three stereogenic centres and crystallizes with two mol-ecules in the asymmetric unit. The five-membered pyrrolidine rings in both mol-ecules exhibit envelope conformations. The -ethyl group of one of the mol-ecules is disordered over two sets of sites in a 0.836 (4):0.164 (4) ratio. In the crystal, both mol-ecules form inversion dimers through pairwise O-H⋯O hydrogen bonds, generating (10) loops, which are linked into a three-dimensional network by weak C-H⋯O hydrogen bonds.