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 (1S,2S,4R,6S,7R,8E)-2,7-dihydroxy-1,6-dimethyl-9-propan-2-yl-5,16-dioxatricyclo[10.3.2.04,6]heptadeca-8,12-dien-17-one .
user
C20H30O5
assistant