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- W3149367152 abstract "Two pofynimgen compounds 1 -methyl-pteridinc-2,4-dione lb and corallistine 2 were isolated from the new+cdedonian sponge Corallisres fulvodesmus L. & L. The structure of corallistine was detcrminated by X-ray single crystal analysis of its 6'4sobutyloxycubonyl derivative 3. i In the course of our search for new biologically active substances in deep water marine invertebrates. we . undertook an investigation of Lhe extracts of the ncw-caledonian sponge Corallisres fulvodesmus Levi & Levi.' This led us to the isalauon of two polynitrogen compounds l-methyl-ptcridine-2,4-dionc lb and a new compound with a novel smcture codistine 2. The sponge was ground. freeze-dried and extracted with 80% ethanol. The alcohol was &pontcd under reduced pressure and the aqueous residue extracted with methylene choride. Sirica gel chromatography of the extract using increasing concentrations of methanol in methylene chloride provided nude compounds lb and 2, which were purified by repeated crystallization and chromtography. respectively. I-MethyI-pteridine-2,4-dione lb was readily identified by comparing its physical and specaal data, as we11 as those of its N-methyl derivative IC, with the data reponed in he litenturc.23 Pteridines are widely imal kingdom4and have also been found in marine organisms.5 but l-methyl-pteridine-2,4- its N-demefhyl-derivative, lumazinc, la, has never been isolated previously from natural e 2 crystallized from methanol to afford light yellow crystals m.p. 192' (dec). It had the molecular foqula C~OH~~N~OS on the basis of a molccular ion at dz 251.08797 (calc. 251.09463) and elemental malysis. The 1H NMR spectrum in (IDC13-CD30D showed the presence of only three tertiary methyl groups" @default.
- W3149367152 created "2021-04-13" @default.
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- W3149367152 date "1989-01-01" @default.
- W3149367152 modified "2023-09-27" @default.
- W3149367152 title "CORALLISTIFJE, A NEW POLYNITROGEN COMPOUND FROM THE' SPONGE Corallistesfulvodesmus L. & L." @default.
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