You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-(37,38,39,40-tetrazanonacyclo[28.6.1.13,10.112,19.121,28.04,9.013,18.022,27.031,36]tetraconta-1,3,5,7,9,11,13,15,17,19(39),20,22,24,26,28,30(37),31,33,35-nonadecaen-2-yl)benzoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C43H26N4O2
assistant