We discuss phenomenological consequences of the recently-introduced<br />
refinements of the de Sitter swampland conjecture. The conjecture constraints<br />
the first and the second derivatives of the scalar potential in terms of two<br />
$O(1)$ constants $c$ and $c&#039;$, leading to interesting constraints on particle<br />
phenomenology, especially inflationary model building. Our work can also be<br />
regarded as bottom-up constraints on the values of $c$ and $c&#039;$.