C4H8O3
# C4H8O3

The molecular formula $C_4H_8O_3$ may refer to:

* Hydroxybutyric acids:
   * 2-Hydroxybutyric acid (alpha-hydroxybutyric acid)
   * beta-Hydroxybutyric acid (3-hydroxybutyric acid)
   * gamma-Hydroxybutyric acid (4-hydroxybutyric acid, GHB)
* Hydroxyisobutyric acids
   * 2-Hydroxyisobutyric acid
   * 3-Hydroxyisobutyric acid
* Methyl lactate
