碳酸二乙酯

5a,10a-Diethoxyoctahydro-3,8-dioxo-2,2,7,7-tetraphenyldioxazolo[3,2-b:3',2'-e][1,2,4,5]tetrazin-5,10-dicarbonsaeure-diethylester

2-氨基-5,5-二苯基-1,3-恶唑-4-酮

氨基甲酸乙酯

N-甲基脲