You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2R)-2-[(2R,6S)-2,6-dimethylmorpholin-4-yl]-N-[(2-pyridin-2-yl-1,3-thiazol-4-yl)methyl]propan-1-amine by IUPAC nomenclature, provide its molecular formula.
user
C18H26N4OS
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