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What is the molecular formula of the molecule 5,17-diphenyl-10-(4-phenylphenyl)-1-sulfanylidene-8,14-dioxa-1lambda5-phosphapentacyclo[11.7.1.02,7.09,21.015,20]henicosa-2(7),3,5,9,11,13(21),15(20),16,18-nonaene ?
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C42H27O2PS
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