You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (3S,6S,9S,13R,19S,22S)-6-benzyl-19-[(2R)-butan-2-yl]-7,12,12-trimethyl-13-pent-4-ynyl-3,9-di(propan-2-yl)-4,14-dioxa-1,7,10,17,20-pentazabicyclo[20.3.0]pentacosane-2,5,8,11,15,18,21-heptone ?
user
C43H63N5O9
assistant