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Name the molecular formula for the molecule established as 11-(2,4-dimethylphenyl)-10-methoxy-1',1',5',5'-tetramethyl-5,5-bis(4-propoxyphenyl)spiro[6-oxapentacyclo[12.7.0.02,7.08,13.015,20]henicosa-1(14),2(7),3,8,10,12,15,17,19-nonaene-21,3'-cyclohexane] using the IUPAC nomenclature.
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C56H60O4
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