You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2S)-N-[3-(4-methylpiperazin-1-yl)propyl]-1-(2-thiophen-2-ylacetyl)pyrrolidine-2-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C19H30N4O2S
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