N-(3-carbamoylphenyl)-6-(3-ethylureido)nicotinamide
N-(3-ethylphenyl)-6-(3-ethylureido)nicotinamide
N-(3,4-dimethoxyphenyl)-6-(3-ethylureido)nicotinamide
N-(5-chloro-2-methylphenyl)-6-(3-ethylureido)nicotinamide
N-cyclohexyl-6-(3-ethylureido)nicotinamide