C18H18O2

The molecular formula C18H18O2 (molar mass 266.33 g/mol, exact mass 266.13068) may refer to:


 * Dienestrol, a synthetic estrogen
 * 2,8-Dihydroxyhexahydrochrysene, a synthetic estrogen
 * Equilenin, a horse steroid
 * Honokiol, a lignan
 * Juncusol, a 9,10-dihydrophrenathrene found in Juncus species
 * Magnolol, a lignan