Constituintes quimicos dos zoantideos p. caribaeorum e p. variabilis
Jose Gustavo Lima de Almeida, Otilia D L Pessoa
Constituintes quimicos dos zoantideos p. caribaeorum e p. variabilis
Jose Gustavo Lima de Almeida, Otilia D L Pessoa
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Este livro descreve a composicao quimica das especies marinhas palythoa caribaeorum e protopalythoa variabilis coletados no litoral do Ceara-Brasil. O fracionamento cromatografico dos extratos hexano e etanolico resultou no isolamento de quatro esteroides tetraciclico de esqueleto ergostano e quatro ceramidas, alem destes compostos, foram isolados um ester de cadeia alifatica e o nucleosideo 2-metil-timidina. O potencial citotoxico e antifungico das ceramidas foi avaliado, entretanto, estas nao apresentaram atividade. Os compostos foram isolados por tecnicas cromatografica de adsorcao em gel de silica e por HPLC. As estruturas do compostos obtidos foram elucidadas utilizando tecnicas espectroscopicas e espectrometricas, tais como: CG/EM, espectrometria de massas de alta resolucao, IV, RMN 1H, 13C e 15N atraves de sequencia de pulsos uni e bidimensionais e comparacao de dados com a literatura.
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