C4H9NO2
# C4H9NO2

The molecular formula $C_4H_9NO_2$ (molar mass: 103.12 g/mol) may refer to:

* α-Aminobutyric acid
* β-Aminobutyric acid
* γ-Aminobutyric acid (GABA)
* 2-Aminoisobutyric acid
* 3-Aminoisobutyric acid
* Nitroisobutane
* n-Nitrobutane
* Butyl nitrite
* Dimethylglycine
* Isobutyl nitrite
