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preface to fifteenth edition

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ORGANIC COMPOUNDS 1.13<br />

TABLE 1.5 Trivial Names of Heterocyclic Systems Suitable for Use in Fusion Names<br />

Listed in order of increasing priority as senior ring system.<br />

Structure Parent name Radical name Structure Parent name Radical name<br />

Thiophene<br />

Thienyl<br />

2H-Pyrrole<br />

2H-Pyrrolyl<br />

Pyrrole<br />

Pyrrolyl<br />

Thianthrene<br />

Thianthrenyl<br />

Imidazole<br />

Imidazolyl<br />

Furan<br />

Furyl<br />

Pyrazole<br />

Pyrazolyl<br />

Pyran<br />

(2H-shown)<br />

Pyranyl<br />

Isothiazole<br />

Isothiazolyl<br />

Isobenzofuran<br />

Isobenzofuranyl<br />

Isoxazole<br />

Isoxazolyl<br />

Pyridine<br />

Pyridyl<br />

Chromene<br />

(2H-shown)<br />

Chromenyl<br />

Pyrazine<br />

Pyrazinyl<br />

Xanthene*<br />

Xanthenyl<br />

Pyrimidine<br />

Pyrimidinyl<br />

Pyridazine<br />

Pyridazinyl<br />

Phenoxathiin<br />

Phenoxathiinyl<br />

* Asterisk after a compound denotes exception <strong>to</strong> systematic numbering.

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