You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 15-[(2-acetamido-6-aminohexanoyl)amino]-9-benzyl-6-[3-(diaminomethylideneamino)propyl]-12-(1H-imidazol-5-ylmethyl)-3-(1H-indol-3-ylmethyl)-2,5,8,11,14,17-hexaoxo-1,4,7,10,13,18-hexazacyclotricosane-23-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C50H70N16O9
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