You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
12'-hydroxy-4-(methylaminomethyl)-1-(N'-methylcarbamimidoyl)-11'-oxospiro[piperidin-1-ium-3,2'-tetracyclo[10.2.1.13,14.01,6]hexadec-13-ene]-13'-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H38N4O4
assistant