You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-chloroethyl (2R)-2,6,8-trimethyl-3-azatetracyclo[5.4.0.02,4.03,6]undeca-1(11),7,9-triene-4-carboxylate into molecular formula.
user
C16H18ClNO2
assistant