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- [29] Five-membered 2,3-dioxo heterocycles: XLVIII. Reaction of 3-aroyl- and 3-heteroyl-2,4-dihydro-1H-pyrrolo[2,1-c][1,4]-benzoxazine-1,2,4-triones with 3-amino-5,5-dimethyl-2-cyclohexenone Russian Journal of Organic Chemistry, 2004, 40 : 1359 - 1363