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5-(3,5-Dioxo-4-phenyl-1,2,4-triazolidin-1-yl)-1,3-dimethyl-2,4,6(1H,3H,5H)-pyrimidinetrione

5-(3,5-Dioxo-4-phenyl-1,2,4-triazolidin-1-yl)-1,3-dimethyl-2,4,6(1H,3H,5H)-pyrimidinetrione

1-[1,2,3,4-Tetrahydro-1,3-dimethyl-6-(methylamino)-2,4-dioxo-5-pyrimidinyl]-1,2-hydrazinedicarboxylic]acid, 1,2-diethyl ester

1-[1,2,3,4-Tetrahydro-1,3-dimethyl-6-(methylamino)-2,4-dioxo-5-pyrimidinyl]-1,2-hydrazinedicarboxylic]acid, 1,2-diethyl ester

1-Benzoyl-5-(benzoylamino)-1H-pyrazole-4-carboxylic acid ethyl ester

1-Benzoyl-5-(benzoylamino)-1H-pyrazole-4-carboxylic acid ethyl ester

wh224

wh224

N'-Phenylbenzohydrazide

N’-Phenylbenzohydrazide

wh222

wh222

4,5-Dihydro-2-[(triphenylphosphoranylidene)amino]-3-thiophenecarbonitrile

4,5-Dihydro-2-[(triphenylphosphoranylidene)amino]-3-thiophenecarbonitrile

4,5-Dihydro-2-[(triphenylphosphoranylidene)amino]-3-thiophenecarboxylic acid methyl ester

4,5-Dihydro-2-[(triphenylphosphoranylidene)amino]-3-thiophenecarboxylic acid methyl ester

4,5,6,7-Tetrahydro-2-[(triphenylphosphoranylidene)amino]-benzo[b]thiophene-3-carboxylic acid ethyl ester

4,5,6,7-Tetrahydro-2-[(triphenylphosphoranylidene)amino]-benzo[b]thiophene-3-carboxylic acid ethyl ester