A convenient one-pot synthesis of 2β-(O-dibenzyl-phosphate)-oxymethyl-2α-methyl penam 3α-carboxylic acid benzyl ester and 3β-(O-dibenzyl-phosphate)-3α-methyl cepham 4α-carboxylic acid benzyl ester |
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收稿时间: | 2 December 2003 |
修稿时间: | 8 January 2004 |
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