You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (12S,18S,21S)-24-[[2-[2-[2-[2-[5-[(3aR,6aS)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]pentanoylamino]ethoxy]ethoxy]ethoxy]acetyl]amino]-18-(4-aminobutyl)-12-[3-(aminomethylideneamino)propyl]-21-methyl-8,11,14,17,20,23-hexaoxo-1,7,10,13,16,19,22,27,28-nonazabicyclo[24.2.1]nonacosa-26(29),27-diene-6-carboxamide into its molecular formula.
user
C48H81N17O13S
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