fenoleille
Fenoleille is a term that appears to be a misspelling or a non-standard term. It is possible it refers to phenols, a class of organic compounds characterized by a hydroxyl group (-OH) directly attached to an aromatic hydrocarbon group. Phenols are weakly acidic and are found in many natural and synthetic products. Examples include phenol itself (C6H5OH), which is a white crystalline solid, and cresol, which is a mixture of isomers. Phenols are important intermediates in the production of plastics, resins, dyes, and pharmaceuticals. They also exhibit antiseptic and disinfectant properties.
Alternatively, "fenoleille" might be a localized or colloquial term not widely recognized in scientific or standard