You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named (1S,9R,10S,17R)-4-methoxy-17-methyl-17-oxido-17-azoniatetracyclo[7.5.3.01,10.02,7]heptadeca-2(7),3,5-triene;hydrochloride is given. What is its corresponding molecular formula?
user
C18H26ClNO2
assistant