There are impact factor to be discussed such as solvent polarity, nucleofuge, attract electron group the nunucleophilicity of nucleophilic reagent.
探讨碱性、溶剂极性、离去基团、吸电子基团、亲核试剂的亲核性对反应影响。
2
Recently Hunan Cereals, Oils and Foodstuffs Import and Export Group Co. , Ltd. has began to set foot in medical equipment and be engaged in the wholesale and retail of medical equipment and reagent.
粮油集团近年来涉足医疗器械行业，从事医疗设备和试剂的批发、销售。
3
Basic group substituted benzoyl guanidine, its preparing process, its use as medicine or diagnostic reagent, and medicine containing the same.