You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (2R,6R,7S,9S,12R,13S,16S,17S,20S)-17-(furan-2-yl)-4,4,12,16-tetramethyl-3,5-dioxapentacyclo[11.7.0.02,6.07,12.016,20]icosane-9,17-diol into its molecular formula.
user
C26H38O5
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