Polyene antibiotics. IX. An improved method for the preparation of methyl esters of polyene antibiotics.

Abstract
An improved general method for the preparation of methyl esters of polyene antibiotics is discussed. Using this method methyl esters of pimaricin, nystatin, eurocidin, hamycin, hamycins A and B, aureofungin, partricins A and B, candimycin, candicidin and amphotericin B were prepared and their physical properties are reported. The biological activities of hamycins A and B and their methyl esters are also described.

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