152661-13-7 2H-1-Benzopyran-4-carbothioamide, N-(2-cyanoethyl)-2,2-bis(fluoromethyl)-6-nitro- KC 399 KC-399 N-(2-Cyanoethyl)-2,2-bisfluoromethyl-6-nitro-2H-1-benzopyran-4-carbothioamide