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 (1R,2R,4R,6R,7R)-1,10,10-trimethyl-4-[(1R)-1-phenylprop-2-enyl]-3-oxatricyclo[5.2.1.02,6]decane .
user
C21H28O
assistant