Three new esters of 2-(indol-3-yl)ethanol (tryptophol) containing the acyl residues of dehydrocrepenynic (octadeca-9Z,14Z-dien-12-ynoic), oleic and linoleic acids have been identified in fruiting bodies of the Basidiomycete Craterellus cornucopioides supplied with exogenous tryptophol. The esters were formed reversibly in high yields and are possible storage forms of auxin precursors which may be deposited in lipophilic cell compartments.