You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (11-methoxy-7-methyl-13-propyl-15-oxatetracyclo[10.2.1.05,14.08,13]pentadeca-1,3,5(14),10-tetraen-2-yl)methanol by IUPAC nomenclature, provide its molecular formula.
user
C20H26O3
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