You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[[4-chloro-1-(diaminomethylideneamino)isoquinolin-7-yl]sulfonylamino]-4-methoxybenzoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H16ClN5O5S
assistant