IUPAC Nomenclature of Organic Chemistry
   Features recommendations 1979 and 1993. Organized in sections with a search function.
   http://www.acdlabs.com/iupac/nomenclature/

IUPAC at Queen Mary and Westfield College, London
   Full text of IUPAC recommendations, bibliographic information.
   http://www.chem.qmw.ac.uk/iupac/