yán jiū rén yuán / lì yòng / tīng huà zuò yòng / gǎi biàn / le / fēn zǐ / de / jié gòu / cóng ér / tí gāo / le / yào wù / de / wěn dìng xìng研究人员利用烃化作用改变了分子的结构,从而提高了药物的稳定性。Researchers used alkylation to alter the molecular structure, thereby improving the stability of the drug.