You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[4-[(2S)-2-hydroxy-3-[[(1S)-2-methyl-1-thiophen-2-ylpropyl]amino]propoxy]phenyl]acetonitrile by IUPAC nomenclature, provide its molecular formula.
user
C19H24N2O2S
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