1,3-Diethyl-1,3-bis(4-nitrophenyl)urea
1,3-Diethyl-1-(4-nitrophenyl)-3-phenylurea
1,3-Diethyl-2-thiobarbituric acid
1,3-Dihydro-1,3,3-trimethyl-2H-indol-2-ylidene acetaldehyde
1,3-Dihydro-1,3-dioxo-2H-isoindole-2-hexanoic acid
1,3-Dihydro-1,3-dioxo-2H-isoindole-2-propionic acid
1,3-Dihydro-1,3-dioxo-2H-isoindole-2-propionyl chloride
1,3-Dihydro-1-(1-methylvinyl)-2H-benzimidazol-2-one
1,3-Dihydro-1-oxoisobenzofuran-5-carboxamide
1,3-Dihydro-1-oxoisobenzofuran-5-carboxylic acid
1,3-Dihydro-1-piperidin-4-yl-2H-benzimidazole-2-thione
1,3-Dihydro-4(or 5)-methyl-2H-benzimidazole-2-thione
1,3-Dihydro-4-(4-(phenylthio)phenyl)-2H-1,5-benzodiazepine-2-thione
1,3-Dihydro-4-methyl-2H-1,5-benzodiazepin-2-one
1,3-Dihydro-4-methyl-2H-imidazol-2-one
1,3-Dihydro-5,6-dimethyl-2H-benzimidazol-2-one
1,3-Dihydro-5,6-dinitro-2H-benzimidazol-2-one
1,3-Dihydro-5-phenyl-2H-1,4-benzodiazepin-2-one