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The "corresponding hydrocarbon" is obtained from the heterocyclic compound by formally replacing each hetero atom with =CH2, =CH-, or =C= in accord with the valence 2, 3 or 4 of the hetero atom replaced.

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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