You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-[10-methoxy-21,21-dimethyl-5-(4-methylphenyl)-6-oxapentacyclo[12.7.0.02,7.08,13.015,20]henicosa-1(14),2(7),3,8(13),9,11,15,17,19-nonaen-5-yl]phenoxy]ethyl 2-methylprop-2-enoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C42H38O5
assistant