Rh. Prager et Ja. Smith, PHOTOLYSIS OF PHENYLDISIC ACIDS - EVIDENCE FOR UNIQUE PRODUCT FORMATION FROM DISCRETE TAUTOMERS, Journal of the Chemical Society, Chemical Communications, (15), 1994, pp. 1805-1806
3-Hydroxy-2-methyl-4-phenylisoxazol-5(2H)-one exists as four tautomers
, two of which are isolated and characterised photolysis in methanol l
eads to formation of products identified as arising uniquely from thre
e of the tautomers, and the 2-phenyl analogue and phenyldisic acid und
ergo similar photochemical reactions.