You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl cyanate;2,7,12,16-tetrabutyl-13-ethyl-15-methyl-14,20,21,22-tetrazatetracyclo[15.2.1.13,6.18,11]docosa-1,3(22),4,6,8,10,12,14,16,18-decaene is the IUPAC name of a molecule. Please give its molecular formula.
user
C39H55N5O
assistant