Compounds of the formula ##STR1## wherein X is alkylene, optionally substituted by hydroxy, methoxy or amino; R.sup.1 is hydrogen or C.sub.1-4 alkyl; R.sup.2 is hydrogen, C.sub.1-4 alkyl, or C.sub.2-4 -alkyl substituted by 1-3 OH groups; R.sup.3 is hydrogen, C.sub.1-4 alkyl, or C.sub.2-4 -alkyl substituted by 1-3 OH groups; R.sup.4 is hydrogen, C.sub.1-4 -alkyl, or C.sub.2-4 -alkyl substituted by 1-3 OH groups; R.sup.5 is C.sub.2-4 -alkyl substituted by 1-3 OH groups; R.sup.6 is hydrogen, C.sub.1-4 -alkyl or C.sub.2-4 -alkyl substituted by 1-3 OH groups; and R.sup.7 is C.sub.2-4 -alkyl substituted by 1-3 OH groups, or a salt thereof with an acid are useful as opaquing agents in x-ray contrast media.
公式为##STR1##的化合物,其中X是烷基,可选用羟基、甲氧基或
氨基取代; R.sup.1是氢或C.sub.1-4烷基; R.sup.2是氢、C.sub.1-4烷基或C.sub.2-4-烷基,取代1-3个OH基团; R.sup.3是氢、C.sub.1-4烷基或C.sub.2-4-烷基,取代1-3个OH基团; R.sup.4是氢、C.sub.1-4烷基或C.sub.2-4-烷基,取代1-3个OH基团; R.sup.5是C.sub.2-4-烷基,取代1-3个OH基团; R.sup.6是氢、C.sub.1-4烷基或C.sub.2-4-烷基,取代1-3个OH基团; R.sup.7是C.sub.2-4-烷基,取代1-3个OH基团,或其与酸的盐在X射线造影剂中可用作不透明剂。