# \mathsmaller does not work inside align*

Here is a minimum working example

\documentclass[11pt]{book}
\usepackage{relsize}
\usepackage{amsmath}
\DeclareMathAlphabet{\denom}{T1}{lmss}{sbc}{n}
\begin{document}
$\denom{C\mathsmaller{ENTI}Meters}$
\begin{align*}
\denom{C\mathsmaller{ENTI}Meters}
\end{align*}
\end{document}

I know Arseneau says "math larger/smaller commands should not be trusted very far, and they will not be useful in every instance" but I wish somebody could find a workaround.

\end{document}