could
be ambiguous because, according to Rule A-21.4, the name benzocyclooctene describes a two-component ring system containing the maximum number of noncumulative double bonds while,
according to Rule A-23.5, it would describe its 5,6,7,8,9,10-hexahydro derivative. Its use is no longer encouraged and the Commission recommends names based on
[n]annulene.

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