You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (17R)-12,23-dihydroxy-21-methoxy-8,8,18,18-tetramethyl-3,9,19-trioxahexacyclo[15.6.1.02,15.04,13.05,10.020,24]tetracosa-1(24),2(15),4(13),5(10),6,11,20,22-octaen-14-one by IUPAC nomenclature, provide its molecular formula.
user
C26H24O7
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