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The reactions of 1-alkyl-5-hydroxy-4,5-diphenyl-1,5-di-hydro-2H-imidazol-2-ones or 7-hydroxy-7,7a-diphenyltetrahydroimidazo[5,1-b][1,3]oxazol-5(6H)-one with 1-phenylurea selectively afford new 1-substituted 3a,6,6a-triphenylglycolurils. Crystals of four representatives were studied by X-ray diffraction when the formation of two conglomerates was discovered.
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Баранов et al. (2025) studied this question.
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