73622-92-1 BRN 2003741 CARBAMIC ACID, N,N'-VINYLENEDI-, DIANHYDRIDE with 3-IODOPROPIONIC ACID N,N'-Vinylenebis(3-iodopropionic acid carbamic acid anhydride) Propionic acid, 3,3'-diiododi-, dianhydride with N,N'-vinylenedicarbamic acid