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1 Center for Research in Pharmacology and Toxicology, University of North Carolina School of Medicine, Chapel Hill, North Carolina
In the article by Kenneth H. Dudley, Thomas C. Butler and Dorothy Joimnson, Vol. 179, No. 3, December 1971, the following corrections should be noted.
The structure of the dimer, "penicilloylpenicillenic acid," shown in Scheme I, p. 517, is misplaced and should have appeared in Scheme III, p. 519.
The equilibrium condition between benzylpenicillenic acid and its noimabsorbing timiazoliclinyl- oxazolone shown in Scheme II, p. 518, is misplaced and should imave appeared in Scheme I, p. 517.
The intermolecular addition of thiol to benzylpenicillenic acid shown as i
ii in Scheme III, p. 519, is misplaced and should have appeared in Scheme II, p. 51S.