C15H18O3

The molecular formula C15H18O3 may refer to:


 * Arglabin, a sesquiterpene lactone
 * Irofulven, an experimental antitumor agent
 * Loxoprofen, a nonsteroidal anti-inflammatory drug
 * Plicatin B, a hydroxycinnamic acid
 * Santonin, a drug which was widely used in the past as an anthelminthic