Preparation of unsymmetrical selenides via the reaction of arylselenol with alkyl halides needs at least equal molar cesium hydroxide as the base.是什么意思_Preparation of unsymmetrical selenides via the reaction of arylselenol with alkyl halides needs at least equal molar cesium hydroxide as the base.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句