Sweeteners of the formula:
and food-acceptable salts thereof, wherein the substituents have the meaning disclosed in the specification, and an edible composition comprising a sweetening effective amount of a compound of the above formula.
                            式的
甜味剂:
及其可被食品接受的盐,其中取代基具有说明书中公开的含义,以及包含增甜有效量的上式化合物的可食用组合物。