You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2,5,11,14,20,23,29,32,37,39-decaza-38,40-diazanidanonacyclo[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;oxovanadium(2+) by IUPAC nomenclature, provide its molecular formula.
user
C28H12N12OV
assistant