You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R,6S)-4-[[5-(2,4-dichlorophenyl)-5-(1,2,4-triazol-1-ylmethyl)oxolan-2-yl]methyl]-2,6-dimethylmorpholine is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H26Cl2N4O2
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