上游原料
Meldrum's acid; 2,2-dimethyl-1,3-dioxane-4,6-dione；Malonic acid cyclic isopropylidene esterpropanoyl chloride; propionyl chlorideD-aspartic acid; (2R)-2-aminobutanedioic acid2,2-dimethyl-5-propionyl-1,3-dioxane-4,6-dionepropyl 3-oxo-3-phenylpropanoatepropyl (E)-3-amino-3-phenyl-2-propenoatebutyraldehydepropyl 6-ethyl-5-[(ethylsulfanyl)carbonyl]-2-phenyl-4-propyl-1,4-dihydro-3-pyridinecarboxylateS-ethyl 3-oxopentanethioate1-ethanethiol; ethylhydrosulfide
