You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1S,5S,10R)-6-[(4-hydroxy-3-methoxyphenyl)methylidene]-4,9,12-trioxatetracyclo[6.5.1.01,10.05,10]tetradecane-7,13-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H18O7
assistant