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,3E,5S,8R,12R,13R,16S)-5,8,12-trihydroxy-4,8,12,16-tetramethyl-14-oxabicyclo[11.3.1]heptadec-3-en-15-one .
user
C20H34O5
assistant