You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[4-[5-[[4-(4-chlorothiophen-2-yl)-5-[[(2R,5R)-2,5-dimethylpyrrolidin-1-yl]methyl]-1,3-thiazol-2-yl]carbamoyl]pyrazin-2-yl]-2-methylpiperazin-1-yl]propanoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H34ClN7O3S2
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