You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4R,5S)-5-[1-[4-(diethylamino)phenyl]-2,5-dimethylpyrrol-3-yl]-1-[3-(dimethylamino)propyl]-4-pyridin-2-ylimidazolidine-2-thione is the IUPAC name of a molecule. Please give its molecular formula.
user
C29H40N6S
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