You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(Z)-7-[(1R,2R,4R,6S)-6-[(4-methylphenyl)sulfonylamino]-2-bicyclo[2.2.1]heptanyl]hept-5-enoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H29NO4S
assistant