| abstract |
COMPOUNDS OF THE FORMULA: 1-((2,6-DI(I-),3-(R1-N(-R2)-CH2-),5-(HOOC-)PHENYL)-N(-R3)- A-N(-R3'')-),2,4,6-TRI(I-),3-(R1''-N(-R2'')-CH2-),5-(HOOC-)- BENZENE WHEREIN R1 AND R1'' ARE EACH HYDROGEN OR LOWER ALKYL HAVING NO MORE THAN 5 CARBON ATOMS, R2; R2''; R3; AND R3'' ARE EACH LOWER ACYL HAVING NO MORE THAN 5 CARBON ATOMS, AND A IS AN ALKYLENE GROUP SUBSTITUTED BY ONE OR MORE SUBSTITUENTS OF THE FORMULA -O-R4, WHEREIN R4 IS HYDROGEN OR LOWER ALKYL OR ACYL HAVING NO MORE THAN 5 CARBON ATOMS; THE ALKYLENE GROUP CONTAINING 3-20 CARBON ATOMS AND BEING OPTIONALLY BROKEN BY ONE OR MORE OXYGEN BRIDGES, OR PHYSIOLOGICALLY ACCEPTABLE SALTS THEREOF ARE PROVIDED. SUCH COMPOUNDS ARE ESPECIALLY SUITABLE TO BE USED FOR X-RAY VISUALIZATION OF BODY CAVITIES. |