1H-Imidazole,2,2'-[azobis(1-methylethylidene)]bis[4,5-dihydro- 2,2'-Azobis[2-(2-imidazolin-2-yl)propane] 20858-12-2 Azobis(N,N'-dimethylene isobutylamidine) Azobis-N,N'-dimethyleneisobutyroamidine Imidazole,2,2'-(azodiisopropylidene)bis[4,5-dihydro- NSC668414