Derivatives of inosine and guanosine.

摘要

This invention relates to novel compounds of the formula CHEM wherein X1 and X2 are each independently hydrogen or halogen with the proviso that at least one of X1 and X2 is a halogen atom, A1 and A2 are each independently hydrogen, halogen or hydroxy with the provisos that where A1 is hydroxy, A2 is hydrogen, and where A2 is hydroxy, A1 is hydrogen, Y1 is nitrogen, a CH group, a CCl group, a CBr group or a CNH2 group, Y2 is nitrogen or a CH group, and Z is hydrogen, halogen, or NH2, which are useful as antiprotozoal agents.