RESUMO
A novel long chain fatty ester, pentyl hentriacontanoate 1 and an orange red pigment, caulerpin 2 have been isolated and characterised from a red alga Chondria armata. The pigment caulerpin hitherto known to be a constituent of green algae of genus Caulerpa is being reported here for the first time from a red alga.
Assuntos
Hidrocarbonetos/isolamento & purificação , Naftalenos/isolamento & purificação , Pirazinas/isolamento & purificação , Rodófitas/química , Hidrocarbonetos/química , Indóis , Estrutura Molecular , Naftalenos/química , Pirazinas/química , Análise EspectralRESUMO
Volvatellin (4) is a highly unstable terpene isolated from the extracts of the Indian opisthobranch mollusk Volvatella sp. The structure and the relative stereochemistry of 4 were determined by NMR methods. The paper also describes a hypothetical biosynthesis of 4 starting from the alga-derived caulerpenyne.
RESUMO
Alcohol extracts of marine algae (Rhodophyceae, Phaeophyceae and Chlorophyceae) were screened for their effect on central nervous system. Of 69 species investigated 8 appeared biologically active, 6 being CNS stimulant and two depressant, sites and dates of collection are given.
