Journal
MARINE DRUGS
Volume 10, Issue 12, Pages 2846-2860Publisher
MDPI AG
DOI: 10.3390/md10122846
Keywords
zoanthids; Palythoa caribaeorum; Protopalythoa variabilis; sulfonylated ceramides
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Funding
- National Agency CNPq
- National Agency CAPES
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The zoanthids Palythoa caribaeorum and Protopalythoa variabilis are among the most abundant marine species along the Brazilian coast. We now report the isolation and structure elucidation of two unprecedented sulfonylated ceramides, palyosulfonoceramide A (1) and palyosulfonoceramide B (2) from specimens collected off Brazil's northeastern coast. The structures of 1 and 2 were established using a combination of NMR analyses, including: evaluation of H-1, C-13, H-1-H-1 COSY, H-1-C-13 HSQC, H-1-C-13 HMBC, and H-1-N-15 HMBC NMR spectra, high-resolution mass spectrometry and chemical degradation. In addition, we also isolated the corresponding known ceramides, N-((2S,3R,4E,8E)-1, 3-dihydroxyoctadeca-4,8-dien-2-yl)-hexadecanamide (3) and N-((2S,3R,4E)-1,3-dihydroxy octadeca-4-en-2-yl)-hexadecanamide (4), which provided further support for the assignments of 1 and 2.
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