C5H9NO2
# C5H9NO2

The molecular formula $C_5H_9NO_2$ (molar mass : 115.13 g/mol) may refer to:

* Allylglycine
* (+)-cis-2-Aminomethylcyclopropane carboxylic acid
* N-Formylmorpholine
* Proline, an amino acid
