title: Bistratamides E-J, modified cyclic hexapeptides from the Philippines ascidian Lissoclinum bistratum.
abstract: The Philippines ascidian Lissoclinum bistratum contained the known metabolites bistratamides C and D, together with six novel modified cyclic hexapeptides, bistratamides E-J. The structures of bistratamides E-J were elucidated by interpretation of spectral data, and the absolute stereochemistry of the constituent amino acids was determined after ozonolysis and acid-catalyzed hydrolysis. Bistratamides E-J were moderately cytotoxic in the HCT-116 cell line assay.
authors.affiliation: Scripps Institution of Oceanography, University of California at San Diego, La Jolla, California 92093-0212.
authors.forename: Lark J
authors.initials: LJ
authors.lastname: Perez
authors.forename: D John
authors.initials: DJ
authors.lastname: Faulkner
mesh_terms: D000818:Animals; D003110:Colonic Neoplasms; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D006868:Hydrolysis; D015394:Molecular Structure; D010456:Peptides, Cyclic / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D010679:Philippines; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D014407:Tumor Cells, Cultured / Q000187:drug effects; D014561:Urochordata / Q000737:chemistry*
chemical_list: D010456:Peptides, Cyclic