The present invention relates to novel sweetness enhancer compounds of the formula (I), or a stereoisomer or a salt or a hydrate thereof, to the use of a compound of formula (I) or a stereoisomer or a salt or a hydrate thereof as a sweetness enhancer, to sweetener compositions comprising at least one sweetener and a compound of formula (I) or a stereoisomer or a salt or a hydrate thereof, to a method for the manufacture of a compound of formula (I) or a stereoisomer or a salt or a hydrate thereof, to methods of making the sweetener compositions and to tabletop sweetener compositions comprising a compound of formula (I) or a stereoisomer or a salt or a hydrate thereof. Further, the invention relates to consumables comprising a consumable product and a compound of formula (I) or a stereoisomer or a salt or a hydrate thereof.
