Chemical Reviews, 1994,Vol. 94,No. 6 1719
ADDITIONS AND CORRECTIONS Bradley S . Davidson. Ascidians: Producers of Amino Acid Derived Metabolites (Chem.Rev. 1993, 93, 1771-1791). The final structure determination of the didemnins was carried out almost simultaneously by two research groups. Although not the first reports to reassign the structures of the originally proposed (2R,4R)-HIP (2R,4R-hydroxyisovalerylpropionate) and (3S,4R)-statine residues to (2S,4S)-HIP and (3S,4R,5S)-isostatine, respectively, the following references were among the first to be published in the general literature: Ewing, W. R.; Bhat, K. L.; Joulli6, M. M. Tetrahedron 1986, 42, 5863. Harris, B. D.; Joulli6, M. M. Tetrahedron 1988, 44, 3489.