2-(tert-Butoxy-carbonyl-amino)-2-(2-fluoro-phen-yl)acetic acid.

The title compound, C(13)H(16)FNO(4), consists of conventional, centrosymmetric carboxyl-ate dimers. These dimers form infinite polymeric chains due to inter-molecular N-H⋯O hydrogen bonding. The 2-fluoro-phenyl unit is disordered over two sets of sites with an ocupancy ratio of 0.