-oyl
ending of the names of acid radicals, formed on the names of the corresponding carboxylic acids ending in -ic or -oic; e.g. fumaroyl, hexanoyl.
| 1971 Nomencl. Org. Chem. (I.U.P.A.C.) (ed. 2) C. 185 The name of a univalent or bivalent acyl radical formed by removal of hydroxyl from all the carboxyl groups is derived from the name of the corresponding acid by changing the ending ‘-oic’ to ‘-oyl’. |