The present invention relates to heterocyclic compounds having antiviral activity. In particular, compounds of formula (I): wherein B, W, X, Y, R.sub.1, R.sub.2, R.sub.3, R.sub.4 and n are as defined herein, are useful in the therapy and prophylaxis of cytomegalovirus (CMV) infection in mammals.
本发明涉及具有抗病毒活性的
杂环化合物。特别是,公式(I)的化合物:其中B、W、X、Y、R.sub.1、R.sub.2、R.sub.3、R.sub.4和n的定义如本文所述,可用于治疗和预防哺乳动物巨细胞病毒(CMV)感染。