Biosynthesis of the Tetracyclines. V. Naphthacenic Precursors McCormick, J. R. D. ; Johnson, Sylvia. ; Sjolander, Newell O. Abstract Publication: Journal of the American Chemical Society Pub Date: June 1963 DOI: 10.1021/ja00894a037 Bibcode: 1963JAChS..85.1692M