https://doi.org/10.1351/goldbook.A00261
A prefix used to indicate that a molecule with two (or more) chiral elements is present as a mixture of the two racemic diastereoisomers in unspecified proportions. For example, the dipeptide formed from ʟ-alanine and ᴅʟ-leucine is ʟ-alanyl-ambo-leucine.