You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (2R)-4-[(3S,6S,13R,16R,19R)-19-benzyl-6-[(2-cyclopentylacetyl)amino]-16-[3-(diaminomethylideneamino)propyl]-3-(1H-imidazol-5-ylmethyl)-2,5,9,15,18-pentaoxo-1,4,10-triazacyclononadec-13-yl]-2-(1H-indol-3-ylmethyl)-4-oxobutanamide into molecular formula.
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C51H67N11O8
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