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Three new cyclic peptides, euryjanicins B (2), C (3), and D (4), have been isolated from the Puerto Rican marine sponge Prosuberites laughlini, and the structures were elucidated by chemical degradation, ESIMS/MS, and extensive 2D NMR methods. When tested against the National Cancer Institute 60 tumor cell line panel, all of the purified isolates displayed weak cytotoxicity.

journal of natural products

Isolation and Structural Elucidation of Euryjanicins B−D, Proline-Containing Cycloheptapeptides from the Caribbean Marine Sponge <i>Prosuberites laughlini</i>

Isolation and Structural Elucidation of Euryjanicins B−D, Proline-Containing Cycloheptapeptides from the Caribbean Marine Sponge Prosuberites laughlini