\documentclass{article}
\usepackage{amsmath, amscd}
\newcommand{\appl}[1]{\left(#1\right)}
\begin{document}
	\begin{displaymath}
		\begin{CD}
			\Phi\appl X @>{\Phi\appl f}>> \Phi\appl Y \\
			@V{\eta_X}VV @VV{\eta_Y}V \\
			\Psi\appl X @>{\Psi\appl f}>> \Psi\appl Y
		\end{CD}
	\end{displaymath}
\end{document}
