You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 4-[4-(1-benzothiophen-5-yl)-8-fluoro-2-methyl-3,4-dihydro-1H-isoquinolin-7-yl]morpholine into its molecular formula.
user
C22H23FN2OS
assistant