You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name (1R,2S,4R,7S,8S,11S,12S,15R,17S)-8,12-dimethyl-6-oxapentacyclo[9.8.0.02,8.04,7.012,17]nonadecan-15-ol ?
user
C20H32O2
assistant