You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (5R)-5-cyclohexyl-N-[(2S)-1-methoxy-3-methylbutan-2-yl]-2,5-dihydro-1H-indolizin-3-imine .
user
C20H32N2O
assistant