{{DISPLAYTITLE: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