refmac-dictionary 5.41-1 (amd64 binary) in ubuntu cosmic

 Dictionary of ligands and constituent blocks (e.g. amino acids, nucleic
 acids, sugars) contains necessary stereochemical information (e.g. bond
 lengths, angles, torsion angles) about small molecules used in refinement
 and model building. Values in the dictionary are for an abstract form of
 monomers, i.e there is no conformational/configurational or environment
 dependence.