Colquhoun, H M Synthesis of dixanthones and poly(dixanthone)s by cyclization of 2-aryloxybenzonitriles in trifluoromethanesulfonic acid. [electronic resource] - Organic letters Jul 2001 - 2337-40 p. digital Publication Type: Journal Article ISSN: 1523-7060 Standard No.: 10.1021/ol010097+ doi