You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (1S,2S,5S,6R,9R,11R,12R)-12-[(2S)-2-(furan-3-yl)-2-hydroxyethyl]-5,6,9-trihydroxy-11-methyl-8,14-dioxatetracyclo[7.6.0.01,6.02,12]pentadecan-13-one into molecular formula.
user
C20H26O8
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