You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (7S,8aS)-2-(3-tert-butyl-4-methoxyphenyl)sulfonyl-7-(5-cyclopropylpyrazin-2-yl)oxy-3,4,6,7,8,8a-hexahydro-1H-pyrrolo[1,2-a]pyrazine into its molecular formula.
user
C25H34N4O4S
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