METHODS Cefsulodin was prepared, taking phenylacetic acid as the starting material, followed by sulfonation, resolution,方法以苯乙酸为原料，经磺化、拆分、酰化、酰胺化和取代五步反应合成头孢磺啶。
The most commonly used method for the covalent binding of biomolecules onto 1-D nanostructures is through the diimide-ac最常用的方法是通过端羧酸基纳米结构的二酰亚胺活化氨基化合物来进行生物分子与1-D纳米结构的共价结合。