You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (4R)-7-[5-[(2,4-difluorophenyl)methyl]-1,3,4-thiadiazol-2-yl]-9-hydroxy-N,N,4-trimethyl-1,8-dioxo-2-propan-2-yl-3H-pyrido[1,2-a]pyrazine-4-carboxamide into its molecular formula.
user
C24H25F2N5O4S
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