You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R,11R,14S,18E)-2,11,17,17,22-pentamethyl-14-propan-2-yl-3-oxa-9,12,15,26,29-pentazatetracyclo[18.5.3.15,9.023,27]nonacosa-1(26),18,20(28),21,23(27),24-hexaene-4,10,13,16-tetrone is the IUPAC name of a molecule. Please give its molecular formula.
user
C31H41N5O5
assistant