5-((Acetyl)(tert-butoxycarbonyl)methylenamino)-4,5-dihydro-4-(4-methoxyphenyl)-2,5-dimethyl-3-furancarbonsaeure-tert-butylester

tert-butoxycarbonylmethylenetriphenylphosphorane

2-羟基亚氨基乙酰乙酸叔丁酯