You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [(2S)-1-[[(2S)-1-[[(1S)-1-carboxyethyl]amino]-1-oxopropan-2-yl]amino]-6-[[(2R)-2-fluoro-2-[(2R,3R,4S,5R,6R)-2,3,4,5-tetrahydroxy-6-(hydroxymethyl)oxan-2-yl]acetyl]amino]-1-oxohexan-2-yl]azanium;chloride by IUPAC nomenclature, provide its molecular formula.
user
C20H36ClFN4O11
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