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,7R,9S,11R)-5-(2-hydroxyethyl)-1-methyl-8,14-dioxapentacyclo[9.7.0.02,7.07,9.012,16]octadeca-2,4,12(16)-triene-6,15-dione into molecular formula.
user
C19H20O5
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