How would you name the dipeptide in aspartame?

Aspartame has aspartic acid on the amino acid side and a modified phenylalanine on the carboxylic acid side. This would mean that the dipeptide with an unmodified phenylalanine would be called 'aspartylphenylalanine.' However, the phenylalanine is modified and is actually a methyl ester. This means that the compound would be named methyl aspartylphenylalaninate based on organic chemistry nomenclature rules.