月 Notes The reaction is very violent when initiating. Therefore, acety lactone needs to be added dropwise 2) The product has good solubility in ethanol. So the the concentration of EtoH should not be too high during washing 》Notes 1) The reaction is very violent when initiating. Therefore, acetylacetone needs to be added dropwise. 2) The product has good solubility in ethanol. So the the concentration of EtOH should not be too high during washing