You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-methyl-N-[2-[(2S)-1-[(2E)-2-[(Z)-prop-1-enyl]penta-2,4-dienyl]azetidin-2-yl]ethyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H27N5
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