一種具有下式之化合物:其中R1、R2、R3、T、W、m、x與y皆如說明書中所定義。亦揭示一種使用上述化合物治療腸病毒感染之方法。 A compound having the formula:in which R1, R2, R3, T, W, m, x, and y are defined as in the specification. Also disclosed is a method of treating enterovirus infection by using a compound described above.