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system
Provide the molecular formula for the IUPAC named substance 5,17-dimethyl-8,14-diphenyl-11-pyridin-3-yl-1-aza-8lambda5,14lambda5-diphosphapentacyclo[11.7.1.02,7.09,21.015,20]henicosa-2(7),3,5,9,11,13(21),15(20),16,18-nonaene 8,14-dioxide .
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C37H28N2O2P2
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