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system
Provide the molecular formula for the IUPAC named substance 17-isocyano-11-methyl-8,14-diphenyl-8,14-bis(sulfanylidene)-1-aza-8lambda5,14lambda5-diphosphapentacyclo[11.7.1.02,7.09,21.015,20]henicosa-2(7),3,5,9(21),10,12,15(20),16,18-nonaene-5-carbonitrile .
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C33H21N3P2S2
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