1,2-Cyclobutanedicarbonitrile, (E)- 1,2-Cyclobutanedicarbonitrile, trans- 3211-20-9 NSC73704 Usaf st-1 WLN: L4TJ ACN BCN -T trans-1,2-Cyclobutanedicarbonitrile trans-1,2-Dicyanocyclobutane