1,1'-((2,3,5,6-Tetraiodo-1,4-phenylene)dicarbonyl)bis-L-proline 34733-02-3 BRN 0466481 L-Proline, 1,1'-((2,3,5,6-tetraiodo-1,4-phenylene)dicarbonyl)bis- Tetrajodterephthalsaure-bis-(2-carboxy-pyrrolidid) [German]