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,9R,12S,15S)-3-(4-aminobutyl)-15-(1H-indol-3-ylmethyl)-9,12-bis(2-methylpropyl)-6-propan-2-yl-1,4,7,10,13,16-hexazacyclooctadecane-2,5,8,11,14,17-hexone .
user
C36H56N8O6
assistant