ACD/Name
Used when the ring contains the maximum number of noncumulative double bonds and at least one double bond is present when the heteroatoms have the bonding numbers (valences) given in Table 1 (see Note 2, below).


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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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