1-Cyano-3,4-epithiobutane 4,5-Epithiovaleronitrile 5-18-06-00016 (Beilstein Handbook Reference) 54096-45-6 BRN 1362236 CYANO-3,4-EPITHIOBUTANE NSC 322064 Thiiranepropanenitrile Valeronitrile, 4,5-epithio-