You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (2,16-dimethyl-5-oxo-6-azatetracyclo[9.7.0.02,8.012,16]octadecan-15-yl) 4-[4-[bis(2-chloroethyl)amino]phenyl]butanoate .
user
C33H48Cl2N2O3
assistant