You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 15,25,33-tris(4-methylpentylsulfamoyl)-2,11,20,29,37,38,39,40-octazanonacyclo[28.6.1.13,10.112,19.121,28.04,9.013,18.022,27.031,36]tetraconta-1,3,5,7,9,11,13(18),14,16,19(39),20,22(27),23,25,28,30(37),31(36),32,34-nonadecaene-6-sulfonic acid into molecular formula.
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C50H57N11O9S4
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