You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [methyl-[1-[1-[[(2S)-1-methylpyrrolidin-2-yl]methyl]imidazol-2-yl]propyl]carbamoyl] formate into its molecular formula.
user
C15H24N4O3
assistant