You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (2R,6S,8R)-4-(4-bromo-2-methoxyphenyl)-8-(methoxymethyl)-10-oxatricyclo[5.2.1.02,6]decane-3,5-dione .
user
C18H19BrO5
assistant