tris(substituted phenyl) bismuth compounds of formula (I) and pharmaceutically acceptable salts thereof are useful x-ray radiographic imaging agents: ##STR1## wherein X.sub.1, X.sub.2 and X.sub.3 are as defined in the specification.
取代
苯基
铋化合物的结构式(I)及其药用可接受盐是有用的X射线造影剂:##
STR1## 其中X1、X2和X3如规范中定义。