You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[(11R,17S,20S,23S)-20-(2-methylpropyl)-2,9,12,18,21-pentaoxo-11-propan-2-yl-6,25-dithia-3,10,13,19,22,27,28-heptazatetracyclo[22.2.1.15,8.013,17]octacosa-1(26),5(28),7,24(27)-tetraen-23-yl]propanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C29H40N8O6S2
assistant