You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (1S,7S,9R,10R,14R,19S)-19-ethyl-7-(1-hydroxy-2,3-dimethoxybut-2-enoxy)-3-(4-methoxyphenyl)-14-methyl-20-oxatetracyclo[10.10.0.02,10.05,9]docosa-3,11-diene-13,21-dione by IUPAC nomenclature, provide its molecular formula.
user
C37H50O8
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