73622-94-3 Acetic acid, hexachloro-, dianhydride with N,N'-vinylene dicarbamic acid Acetic acid, trichloro-, dianhydride with 1,2-ethenediylbis[carbamic acid] Carbamic acid, N,N'-vinylenedi-, dianhydride with trichloroacetic acid N,N'-Vinylenebis(trichloroacetic acid carbamic acid anhydride) NSC221221 WLN: GXGGVOVM1U1MVOVXGGG