You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (1R,10R)-13-[(4-chlorophenyl)methyl]-5-methyl-4,6,13-triazatricyclo[8.2.1.03,8]trideca-3(8),4-dien-7-one .
user
C18H20ClN3O
assistant