A prefix used to indicate that a molecule with two (or more) @C01057@ elements is present as a mixture of the two @R05026@ @D01679@ in unspecified proportions. For example, the dipeptide formed from l-alanine and dl-leucine is l-alanyl-ambo-leucine.
PAC, 1996, 68, 2193. (Basic terminology of stereochemistry (IUPAC Recommendations 1996)) on page 2198 [Terms] [Paper]
See also:
PAC, 1982, 54, 1507. (Nomenclature of Tocopherols and Related Compounds) on page 1507 [Terms] [Paper]
PAC, 1984, 56, 595. (Nomenclature and Symbolism for Amino Acids and Peptides) on page 595 [Terms] [Paper]