Which aspartic-acid-containing dipeptide-derived sweetener is approximately 2000 times sweeter than sucrose?

Explanation

Alitame is an aspartic-acid-containing dipeptide-derived sweetener. JECFA describes it as approximately 2000 times sweeter than sucrose. Aspartame is also peptide-derived but is much less intensely sweet; saccharin and sucralose have different chemical structures.