| 摘要 |
Thiazolopyrazines having growth inhibitory activity against microorganisms are of the formula <IMAGE> wherein X is -Br, -Cl or F and R is -H or -CH3-xYx, Y is -Br, -Cl, or F and x is 0, 1, 2 or 3. These compounds also have utility as intermediates for the preparation of three-ring compounds which are highly active against microorganisms.
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