上游原料
Meldrum's acid; 2,2-dimethyl-1,3-dioxane-4,6-dione；Malonic acid cyclic isopropylidene esterpropanoyl chloride; propionyl chloride2,3,5,6-Tetrachloro-1,4-benzoquinone; 2,3,5,6-Tetrachlorobenzo-1,4-quinone; p-Chloranil2,2-dimethyl-5-propionyl-1,3-dioxane-4,6-dionepropyl 3-oxo-3-phenylpropanoatepropyl (E)-3-amino-3-phenyl-2-propenoateS-ethyl 3-oxopentanethioateethyl 4,6-diethyl-5-[(ethylsulfanyl)carbonyl]-2-phenyl-1,4-dihydro-3-pyridinecarboxylate1-ethanethiol; ethylhydrosulfide
