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Heterocyclic Systems
Rule B-2. Trivial and Semi-trivial Names 
2.11 - The following trivial and semi-trivial names constitute a partial list of such names which are retained for the compound and as a basis of
fusion names. The names of the radicals shown are formed according to Rule B-5.
List of retained names
2.12 - The following trivial and semi-trivial names are retained but are not recommended for use in fusion names. The names of the radicals shown are formed according to Rule
B-5.
List of retained names
See Recommendations'93 R-9.1, Table 23 and 23(a)
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Fused Heterocyclic Systems
Replacement Nomenclature
Radicals
Cationic Hetero Atoms
This HTML reproduction of Sections A, B and C of IUPAC "Blue Book" is as close as possible to the
published version [see Nomenclature of Organic Chemistry, Sections A, B, C, D, E, F, and H, Pergamon Press, Oxford, 1979.
Copyright 1979 IUPAC.] If you need to cite these rules please quote this reference as their source.
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