4-amino-3-(4-methylsulfonylphenyl)-1,2-oxazole-5-carboxamide

原甲酸三乙酯

1-(4-methylsulfonylphenyl)-2-nitroethanone

3-(4-methanesulfonyl-phenyl)-4-nitro-isoxazole-5-carboxylic acid ethyl ester

N-[1-(4-methylsulfonylphenyl)-2-nitroethylidene]hydroxylamine