C5H7NO2

The molecular formula C5H7NO2 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