the clinical findings in urography using two of these , the non-ionic agents iohexol ( omnipaque 350 , nyegaard ) and iopamidol ( niopam 370 , bracco/merck ) , are compared with those using sodium iothalamate ( conray 420 , may & baker ltd ) , and are discussed against this theoretical background .
C0022005
iohexol
C0729203
omnipaque