You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 3-cyclohexyl-2-methyl-3,6,7,8,9,9a-hexahydro-1H-pyrazino[1,2-a]pyrazin-4-one into molecular formula.
user
C14H25N3O
assistant