N-氰基-N’-甲基乙脒

N-氨基甲酰-alpha-氨基-异丁酸

1,3-diethyl-4,5-dihydroxy-imidazolidin-2-one

氰化钾

ethyl (1-amino-2-methyl-1-oxopropan-2-yl)carbamate