You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-methoxy-4-[(3,4,5,6-tetrahydro-2H-azepin-1-ium-7-ylhydrazinylidene)methyl]phenol;chloride The above is the IUPAC name of a molecule. Write its molecular formula.
user
C14H20ClN3O2
assistant