You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[[2-oxo-3-[4-(4-phosphanyl-2,3,4a,5,7,7a-hexahydropyrrolo[3,4-b][1,4]oxazin-6-yl)benzene-3,5-diid-1-yl]-1,3-oxazolidin-5-yl]methyl]acetamide;uranium;vanadium is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H23N4O4PUV-2
assistant