tris-(4-dimethylamino-phenyl)-acetic acid ethyl ester

全氯环己-2-烯-1-酮

ethyl 2-[(5-amino-3-methyl-1,2-oxazol-4-yl)amino]-2-oxoacetate

2-(2,4-dihydroxyphenyl)-2-oxoacetic acid

ethyl 2-[[5-[(2-ethoxy-2-oxoacetyl)amino]-3-methyl-1,2-oxazol-4-yl]amino]-2-oxoacetate