Didemnin antibiotic

Patent Granted Didemnins are cyclic depsipeptide compounds isolated from a tunicate (sea-squirt) of the genus Trididemnum (family of Didemnidæ) that were collected in the Caribbean Sea. They were first isolated in 1978 at the University of Illinois.[1] Although more than nine didemnins (didemnins A-E, G, X and Y) have been isolated from the extract of Trididemnum solidum, didemnin B is the one that possesses the most potent biological activities.