ACD/Spectrus Processor
It is convenient to classify the main operation involved in functional class nomenclature as an additive one, as is done here. However, it is also possible (and probably more relevant from a historical point of view) to regard the process as one of specifying the "radicals" present in compounds for which a class name is given. For instance, the name methyl alcohol (for ) consists of the name methyl for the "radical" and the class name alcohol (for ).

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This HTML reproduction is as close as possible to the published version [see IUPAC, Commission on Nomenclature of Organic Chemistry. A Guide to IUPAC Nomenclature of Organic Compounds (Recommendations 1993), 1993, Blackwell Scientific publications, Copyright 1993 IUPAC]. If you need to cite these rules please quote this reference as their source.

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