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organic compounds
The title compound, C6H11NO2.H2O, crystallizes in the zwitterion form with methyl and carboxyl substituents anti to each other. The pyrrolidine ring displays the unusual half-chair conformation C2—Cδ-endo (N-exo). In the crystal, symmetry related molecules form zigzag chains extending along the a axis. Water molecules connect pairs of these chains by forming two hydrogen bonds.