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 [(1S,3R,7R,9R)-3,9-dimethyl-6-oxo-1-tetracyclo[5.4.1.04,12.09,12]dodecanyl] (4-methylphenyl) carbonate .
user
C22H26O4
assistant