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 benzyl (5R,8R,10S,16S,19R)-16-(2-bromoethoxy)-5-methyl-12-methylidene-11-oxo-7-azahexacyclo[11.3.2.11,5.010,15.010,17.08,19]nonadecane-7-carboxylate .
user
C30H36BrNO4
assistant