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,7S,10R,12S,13R,15R,18S)-7-hydroxy-12,13,15,17,20,20-hexamethyl-18-trimethylsilyloxy-2,4,9-trioxapentacyclo[14.3.1.01,5.06,13.07,10]icos-16-ene-3,14-dione .
user
C26H40O7Si
assistant