2-[1-(Ethylsulfonyl)-3-azetidinylidene]acetonitrile1187595-85-2100 % similar 1-(tert-Butoxycarbonyl)-3-(cyanomethylene)azetidine1153949-11-139 % similar 3-(Cyanomethylene)cyclobutanecarbonitrile1153949-98-432 % similar