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New erythrolides from the Caribbean gorgonian octocoral Erythropodium caribaeorum
Darryl Banjoo1, Baldwin S Mootoo, Russel S Ramsewak
1Department of Chemistry, University of the West Indies, St. Augustine, Trinidad and Tobago.
Abstract:
Seven new briarane diterpenes, erythrolides K-Q (1-7), as well as the known compounds erythrolides A, B, C, F, and J have been isolated from samples of the Caribbean gorgonian Erythropodium caribaeorumcollected at Buccoo Reef and Flying Reef, Tobago. The structures of the new compounds were determined by high-resolution 1H and 13C NMR spectroscopy utilizing COSY, HMBC, HMQC, and NOESY experiments. The structures of erythrolides K and P were confirmed and their relative stereochemistry determined by X-ray crystallographic analysis.
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