Novel 2'-halomethylidene,2'-ethenylidene and 2'-ethynyl cytidine, uridine and guanosine derivatives

摘要

This invention relates to certain novel 2′-halomethylidene, 2′-ethenylidene and 2′-ethynyl cytidine, uridine and guanosine derivatives, and compositions thereof, which are useful in the treatment of patients afflicted with neoplastic or viral disease states.