You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as (1R,5S,8S,9S)-6,8,9-trimethylspiro[3-oxabicyclo[3.3.1]non-6-ene-4,1'-cyclopentane] using the IUPAC nomenclature.
user
C15H24O
assistant