6-methyl-2-sulfanylidene-1,3-oxazin-4-one

N-甲基-3-氧代-N-苯基丁酰胺

N-羟基乙基乙酰乙酰胺

(E)-1-butoxy-2-diazonioethenolate

(4-nitrophenyl) 3-oxobutanoate