
; of these methods, one involves modification of the preceding rules, the other does not, as illustrated for carboxylic acids by Rules
(a), respectively, below. However, when the characteristic group concerned is attached to a ring, only the method of Rule C-11.11 (b) is used in systematic
nomenclature.
A different type of treatment for certain amines is also described below (Rule C-11.4)
.


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