C5H7NO2
# C5H7NO2

The molecular formula $C_5H_7NO_2$ may refer to:

* Ethyl cyanoacetate
* Piperidinediones
   * 2,3-Piperidinedione
   * 2,4-Piperidinedione
   * 2,5-Piperidinedione
   * 2,6-Piperidinedione
   * 3,4-Piperidinedione
   * 3,5-Piperidinedione
* 1-Pyrroline-5-carboxylic acid
