[(E)-[amino(nitramido)methylidene]amino]urea

[(E)-1-(4-chlorophenyl)ethylideneamino]urea

1-(carbamoylamino)-2,4-dimethyl-6-oxopyridine-3-carboxylic acid

3-甲基-5-苯基-1H-吡唑-4-羧酸甲酯

3-甲基-5-苯基-1H-吡唑-4-羧酸乙酯