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The triazolopyrimidine natural product essramycin (1) was synthesized without the use of protecting groups via a two-step reaction scheme involving a 3-amino-1,2,4-triazole intermediate, and its structure was unequivocally determined. However, in contrast to the natural product, the synthetic essramycin (1) did not display any antibacterial activity.
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Tee et al. (2010) studied this question.
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