You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (3S,6S,9S,12S,15S)-3-benzyl-9-ethyl-6,12-bis(2-methylpropyl)-15-propan-2-yl-1,4,7,10,13-pentazacyclopentadecane-2,5,8,11,14-pentone .
user
C30H47N5O5
assistant