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2. Murray, R. D. H., Méndez, J. and Brown, S. A. 1982.The Natural Coumarins, 227N. Y.: John Wiley and Sons.
3. Lednicer, D. and Mitscher, L. A. 1977.The Organic Chemistry of Drug Synthesis, 330N. Y.: John Wiley and Sons. and references cited therein.
4. Ketocoumarins as photosensitizers and photoinitiators
5. Ketocoumarins