May, 1978] BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, VOL. 51 (5), 1433—1440 (1978) 1433 Structure-taste Relationship of Novel aL-Aspartyl Dipeptide Sweetners* Muneji Miyoshi, Ken-ichi Nunami, Hiroshi Sugano, and Toshiyuki Fujii Research Laboratory of ...