You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 4-[2-(3-fluoro-4-methoxyphenyl)-6-methoxy-4-methyl-3H-inden-1-yl]thiophene-3-carbonitrile into molecular formula.
user
C23H18FNO2S
assistant