You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-tert-butyl-5-methylpyrazol-1-ide;3-tert-butyl-5-methylpyrazol-2-ide;europium(2+);oxolane is the IUPAC name of a molecule. Please give its molecular formula.
user
C48H84Eu2N8O4
assistant