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Medical Definition of Iopentol
1. N,N'-Bis(2,3-dihydroxypropyl)-5-[N-(2-hydroxy-3-methoxypropyl) acetamido]-2,4,6-triiodoisophthalamide;a nonionic, monomeric, low osmolar radiographic contrast medium for intravenous urography or angiography. (05 Mar 2000)