[Carbohydrate linkage with the peptide portion of the ristomycin A molecule]

The mannose monosaccharide residue in ristomycin A is bound via C-3 phenolic oxygen of the 1,2,3,5-substituted ring with actinoidinic amino acid. The tetrassacharide branch is attached to the only phenolic oxygen of triaminotricarboxylic acid. The ristosaminyl residue is linked via one of the two aliphatic hydroxyl groups of the same amino acid. By the location of neutral carbohydrates risotmycin A does not differ from ristocetin A.