氢碘酸

肌氨酸酐

4-苯基-2,4-二氧丁酸乙酯

1,3-二甲基-2-硫代-咪唑烷-4,5-二酮

N-(1,3-dimethyl-2,5-dioxo-imidazolidin-4-yl)-N-methyl-urea