Szukana fraza: [Opis = "tytuł równoległy\: Tautomerism of 2\-hydrazino\-4\-phenyl\-thiazole↔4\-phenyl\-thiazol\-2\-one hydrazone \: the derivatives of acids. I, 4\-phenyl\-3\-R\-thiazol\-2\-ylidene and ß\-methyl\-ß\-\(4\-phenyl\-thiazol\-2\-yl\)\-hydrazides of acetic and benzoic acid"]

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