UN PROCEDIMIENTO PARA LA PREPARACION DE NUEVOS DERIVADOS PE-NEM

摘要

A compound of formula (II): or a pharmaceutically acceptable salt or in vivo hydrolysable ester thereof, wherein one of R<1> or R<2> is hydrogen, and the other is an optionally substituted six-membered heteroaryl ring including one two or three nitrogen atoms, and R<3> is hydrogen or an organic group.