上游原料
isopropyl (E)-3-amino-2-butenoateisopropyl 3-oxobutanoate; Isopropyl acetoacetateMeldrum's acid; 2,2-dimethyl-1,3-dioxane-4,6-dione；Malonic acid cyclic isopropylidene ester3-chloro-6-fluoro-2-(trifluoromethyl)benzaldehydemethyl 4-fluoro-3-oxobutanoate1-chloro-4-fluoro-2-(trifluoromethyl)benzenemethyl(phenyl)formamide;N-Methylformanilide;N-Formyl-N-methylaniline;Methylphenylformamide;N-methyl-N-phenylformamide;N-Methyl-N-formylaniline;N-Formyl-N-methylaniline2-fluoroacetyl chloride5-(2-fluoroacetyl)-2,2-dimethyl-1,3-dioxane-4,6-dione
