Bis(2-cyanoethyl) ether1656-48-031 % similar 3-Bromopropionitrile2417-90-531 % similar Tris(cyanoethyl)phosphine4023-53-431 % similar 3-Chloropropionitrile542-76-731 % similar 2-Amino-1-propene-1,1,3-tricarbonitrile868-54-230 % similar