You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1R,9R,10S)-3,4-dimethoxy-17-methyl-17-azatetracyclo[7.5.3.01,10.02,7]heptadeca-2(7),3,5-triene;hydrochloride The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H28ClNO2
assistant