S-4-bromophenyl 6-nitro-2-oxo-2H-chromene-3-carbothioate
6-nitro-2-oxo-N-(3-(trifluoromethyl)phenyl)-2H-chromene-3-carboxamide
6-nitro-2-oxo-N-m-tolyl-2H-chromene-3-carboxamide
N-(2-methoxyphenyl)-6-nitro-2-oxo-2H-chromene-3-carboxamide
6-nitro-2-oxo-N-o-tolyl-2H-chromene-3-carboxamide