%0 Journal Article %A Cychon, Christine %A Köck, Matthias %D 2010 %T Stylissamides E and F, Cyclic Heptapeptides from the Caribbean Sponge Stylissa caribica %U https://acs.figshare.com/articles/journal_contribution/Stylissamides_E_and_F_Cyclic_Heptapeptides_from_the_Caribbean_Sponge_i_Stylissa_caribica_i_/2774857 %R 10.1021/np900664f.s001 %2 https://acs.figshare.com/ndownloader/files/4469275 %K NMR spectroscopic data %K Stylissamides E %K cyclic heptapeptides %K Caribbean sponge Stylissa caribica %K stylissamide %K Cyclic Heptapeptides %K Caribbean Sponge Stylissa caribicaIn addition %K cyclo %X In addition to the four known stylissamides, A (1), B (2), C, and D, two new cyclic heptapeptides, stylissamides E (3) and F (4), were isolated from the Caribbean sponge Stylissa caribica. The structures of 3 and 4 were elucidated from a combination of mass spectrometric and NMR spectroscopic data as cyclo-(cis-Pro1-Tyr2-trans-Pro3-Ala4-Ile5-Gln6-Ile7) for stylissamide E (3) and cyclo-(trans-Pro1-cis-Pro2-Phe3-Asp4-trans-Pro5-Arg6-Phe7) for stylissamide F (4). %I ACS Publications