5-Butyrylamino-N-methyl-2,4,6-triiodoisophthalamic acid N-methylglucamine salt 67336-59-8 ISOPHTHALAMIC ACID, 5-BUTYRYLAMINO-N-METHYL-2,4,6-TRIIODO-, N-METHYLGLUCAMINE SA Isophthalamic acid, 5-butyrylamino-N-methyl-2,4,6-triiodo-, N-methylglucamine salt