102888-61-9
2-oxo-3-(triphenylphosphoranylidene-hydrazono)-propionic acid ethyl ester
→
~70%
143209-16-9
ethyl 3-hydrazinylidene-2-oxopropanoate
14214-10-9
3-二氮杂-2-氧代丙酸乙酯
143209-28-3
ethyl 1,2,4-triazine-5-carboxylate