Media type: E-Article Title: Benzopyrones. Part XI. Some 3-substituted 4-oxochromen-2-carboxylic acid derivatives Contributor: Ellis, Gwynn P.; Thomas, Idris L. Published: Royal Society of Chemistry (RSC), 1974 Published in: Journal of the Chemical Society, Perkin Transactions 1 (1974), Seite 2570 Language: English DOI: 10.1039/p19740002570 ISSN: 0300-922X; 1364-5463 Origination: Footnote: