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system
Name the molecular formula for the molecule established as 18-[4-(9-thia-18-azahexacyclo[15.7.0.02,10.03,8.011,16.019,24]tetracosa-1(17),2(10),3,5,7,11,13,15,19,21,23-undecaen-18-yl)phenyl]-9-thia-18-azahexacyclo[15.7.0.02,10.03,8.011,16.019,24]tetracosa-1(17),2(10),3,5,7,11,13,15,19,21,23-undecaene using the IUPAC nomenclature.
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C50H28N2S2
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