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What is the molecular formula of the molecule identified by 11,17,21,21-tetramethyl-5,5-diphenyl-6-oxapentacyclo[12.7.0.02,7.08,13.015,20]henicosa-1(14),2(7),3,8(13),9,11,15(20),16,18-nonaene ?
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C36H30O
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