Pullulan aminoalkyl ether of the present invention wherein -R1- is propylene can also be prepared by using a 3-amino-l,2-epoxypropane derivative of the formula (II是什么意思_Pullulan aminoalkyl ether of the present invention wherein -R1- is propylene can also be prepared by using a 3-amino-l,2-epoxypropane derivative of the formula (II在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句