You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-[21-(2-aminoethoxy)-3-(3-amino-1-hydroxypropyl)-6-[1,2-dihydroxy-2-(4-hydroxyphenyl)ethyl]-11,20,25-trihydroxy-15-(1-hydroxyethyl)-2,5,8,14,17,23-hexaoxo-1,4,7,13,16,22-hexazatricyclo[22.3.0.09,13]heptacosan-18-yl]-4-[4-[2-(4-undecylpiperazin-1-yl)ethoxy]phenyl]benzamide into molecular formula.
user
C66H99N11O17
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