Journal
ORGANIC LETTERS
Volume 5, Issue 23, Pages 4393-4396Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol0356800
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Funding
- NCI NIH HHS [R01 CA24487, CA52955, R01 CA47135] Funding Source: Medline
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Structurally unique steroids, isocyclocitrinol A (1) and 22-acetylisocyclocitrinol A (2), were isolated from the extract of a saltwater culture of sponge-derived Penicilliun citrinum. The structures were established by analysis of 1D and 2D NMR data. The absolute structures were determined on the basis of X-ray structure analysis and application of modified Mosher's method. Furthermore, the structure of cyclocitrinol (3a) previously isolated from a terrestrial P. citrinum was revised as 3b. Compounds 1 and 2 showed weak antibacterial activity against Staphylococcus epidermidis and Enterococcus durans.
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