Aminomalonyl alanine compounds and use as dietary sweeteners
Seltzman, H., & Hsieh, Y. (1986). Aminomalonyl alanine compounds and use as dietary sweeteners. (U.S. Patent No. 4564528). http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=4564528
Compounds having relatively long shelf lives in acidic aqueous media and which are useful as sweeteners have the formula ##STR1## or are pharmaceutically acceptable salts thereof, wherein X is --OR or --NHR, or --NH.sub.2, with R being alkyl having 3-10 carbon atoms.