Compounds of the formula ##STR1## wherein R.sub.1 is hydrogen or hydroxyl, and non-toxic, pharmacologically acceptable salts thereof formed with inorganic or organic bases. The compounds as well as their salts are useful as sweetening agents.
化合物的公式为## STR1 ##,其中R.sub.1是氢或羟基,以及与无机或有机碱形成的无毒、药理学上可接受的盐。这些化合物及其盐可用作
甜味剂。