You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3S)-2-tert-butylphosphanylcarbonyl-6-(3-chlorophenoxy)-3,4-dihydro-1H-isoquinoline-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H24ClN2O3P
assistant