Compound \( X \) has a molar mass of \( 102.17 \mathrm{~g} \cdot \mathrm{~mol}^{-1} \) and the following composition:
\begin{tabular}{|l|c|}
\hline element & mass \% \\
\hline carbon & \( 58.77 \% \) \\
\hline hydrogen & \( 13.81 \% \) \\
\hline nitrogen & \( 27.42 \% \) \\
\hline
\end{tabular}
Write the molecular formula of \( X \).
\( \square \)
\( \square \)