療法において使用するための新規チオフェン化合物

摘要

A compound is provided of the formula wherein each u is independently selected from 0 and 1; each R2 and R4 is independently selected from carboxy, carboxyalkyl, alkoxycarbonylalkyl, aminoalkyl, (amino)(carboxy)alkyl and (amino)(carboxy)alkoxy; or a pharmaceutically acceptable salt thereof.