. . "Examples of the alkyl groups and aryl groups in these include those listed above as examples of alkyl groups, substituted alkyl groups, aryl groups, and substituted aryl groups.Examples of the acyl group (R1CO--) in the above-mentioned acyloxy group include those in which R1 is one of the above-mentioned alkyl groups, aryl groups, alkenyl groups, or alkynyl groups." . . .