The present invention includes compounds having structural formula (I), or pharmaceutically acceptable salts, solvate, and/or ester thereof. These compounds are useful as sweet flavor modifiers. The present invention also includes compositions comprising the present compounds and methods of enhancing the sweet taste of ingestible compositions. Furthermore, the present invention provides methods for preparing the compounds.本發明包括具有結構式(I)之化合物,或其醫藥上可接受之鹽、溶劑合物及/或酯。該等化合物可用作甜味修飾劑。本發明亦包括包含本發明化合物之組合物,及增強可攝取組合物之甜味之方法。此外,本發明提供製備該等化合物之方法。