You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (3R,8aR)-3-methyl-2-[[4-(4-piperidin-1-ylbutoxy)phenyl]methyl]-1,3,6,7,8,8a-hexahydropyrrolo[1,2-a]pyrazin-4-one;formic acid into its molecular formula.
user
C25H39N3O4
assistant