ethyl 4-[2-[(2-methylpropan-2-yl)oxycarbonyl]hydrazinyl]-4-oxobut-2-enoate

N-[[氨基-[5-(4-甲氧基苯基)磺酰基呋喃-2-基]亚甲基]氨基]氨基甲酸叔丁基酯

tert-butyl N-[(2-methylpropan-2-yl)oxycarbonylamino]-N-phenylcarbamate

tert-butyl N-[(4-methylbenzoyl)amino]carbamate

2-(环丙烷羰基)肼羧酸叔丁酯