abstract |
Sweetening agents of formula: wherein R is a heterocyclic group which, in a preferred embodiment, is a 2-cyanapyrid-5-yl or 2-cyanopyrimidin-5-yl group, A is O, S or NCN, n is 0 or 1, B is COOH, and wherein, in a preferred embodiment, Y is COOCH 3 and Z is CH 2 C 6 H 5 . |