
handle: 10261/74253
[ES]: Se han estudiado la estructura química del pigmento de Eurotium echinulatum Delacr. mediante métodos degradativos. La hidrólisis ácida libera entre el 84 y 95 por 100 del nitrógeno total de la molécula, en forma de aminoácidos. Según el número de uniones N-fenil residuales, aquellos deben encontrarse en el pigmento en forma de polipéptidos o proteínas. La amalgama de sodio libera entre un 43 y 59 por 100 de compuestos solubles en éter, correspondiendo un 19-32 por 100 a derivados fenÓlicos. En los extractos se identificaron fenoles, antraquinonas y derivados antracénicos, todos, salvo los últimos, encontrados previamente en los medios de cultivo. La reducción con ditionito sódico libera, casi exclusivamente, antraquinonas. Se discuten algunos aspectos estructurales del pigmento en función de los datos degradativos obtenidos.
[EN]: The chemical structure of Eurotrium echinulatum Delacr., pigment has been studied by degradative methods. Acid hydrolysis releases between 84-95 % of total nitrogen from the molecule as amblO acids. According to the number of remaining N-phenyl linkages, the amino acids must be found as polypeptides of proteins. The Na-amalgam releases between 48-59 % of ether soluble substances, of which 19-32% correspond to phenolic compounds. In the extracts, phenols, anthraquinones and anthracene derivatives can be found and all these, except the latter, can be isolated from culture media. The Na-dithionite reduction releases, almost exclusively, anthraquinones. Some structural aspects of the pigment, taking in account the degradative data, are discussed.
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