Ambiguous versus Trivial Names

One of the primary issues with systematic nomenclature is that some names can appear systematic in nature but, in fact, are not. They can have the expected structure of a chemical name generated according to a rules-based system but are false systematic names, at least in their specific context. When the N2S conversion algorithms 

Syntax analysis thio may serve as substituent or as modifier 

FIGURE 3.9 Different meanings of thio in an ambiguous name. 

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