You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl 3-(butan-2-yliminomethyl)-2-hydroxy-6,6-dimethyl-4-oxocyclohex-2-ene-1-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H23NO4
assistant