Take the melting point of the dry solid semicarbazone derivative and record the yield.If it is necessary to recrystallize the semicarbazone derivative, you may do so from an ethanol/water mixture.

• 测定干燥的缩胺基脲衍生物的熔点，并记录其产量，如果有需要将缩胺基脲衍生物进行再结晶的话，你可以用乙醇/水的混合物来进行。