Roccella canariensis Roccanin

Bohman-Lindgren G (1972) Chemical studies on lichens. XXXIII. Roccanin, a new cyclic tetrapeptide from Roccella canariensis. Tetrahedron 28 4625-4630... [Pg.449]

R-/ -Phenyl-j8-alanine (102) has been reported several times as a component of natural peptides such as islanditoxin from Penicillium islandicum and roccanin from the lichen Roccella canariensis and some preliminary observations have been... [Pg.118]

A cyclic tetrapeptide, roccanin (17), has been isolated by Bohman-Lindgren from Roccella canariensis (22). Acid hydrolysis of (17) yielded two amino-acids, L-proline (18) and / -P-phenyl- 3-alanine (19), and quantitative amino-acid analysis confirmed that (18) and (19) were formed in equimolar amounts. Mass spectrometry and the observed chemical reactivity confirmed that (17) was a cyclic peptide. Selective reduction of (17) at the more reactive acylproline linkage by treatment with lithium... [Pg.110]

Bohman-Lindgren, G. Chemical Studies on Lichens XXXIII. Roccanin, a New Cyclic Tetrapeptide from Roccella canariensis. Tetrahedron 28, 4625 (1972). [Pg.220]

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