ethyl ester短语¹⁴⁴⁹⁷²⁺² 基本例句 乙酯 Eleven compounds were identified from acetic acid ethyl ester effective fraction. 确定十六碳酸为小毛茛抗肿瘤有效成分。 fabiao Microwave-assisted oxidation of cyclohexene to cyclohexane epoxide with30% hydrogen peroxide catalyzed by tungsten catalysts without solvent and with ethyl ester as the solvent was studied. 研究了微波辐射下30%过氧化氢氧化环己烯为环氧环己烷中反应时间、溶剂和催化剂等因素对环氧环己烷的选择性和转化率的影响。 j-fci