Structure of the O-polysaccharide of the lipopolysaccharide of Pragia fontium 97U116

The O-polysaccharide of Pragia fontium 97U116 was obtained by mild acid degradation of the lipopolysaccharide and studied by sugar analysis along with 1D and 2D 1H and 13C NMR spectroscopy. The following structure of the pentasaccharide-repeating unit was established: →2)-α-d-Galf-(1→3)-α-l-Rhap2AcI-(1→4)-α-d-GlcpNAcI-(1→2)-α-l-RhapII-(1→3)-β-d-GlcpNAcII-(1→