You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-2-[(2,6-dichlorobenzoyl)amino]-5-oxo-6-[[3-(2,3,4,5-tetrahydropyridin-6-ylmethyl)benzoyl]amino]hexanoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H27Cl2N3O5
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