You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (6S)-6-[[(E)-1-carboxybut-2-en-2-yl]amino]-1,2,3,4,4a,5,6,7,8,8a-decahydroisoquinoline-3-carboxylic acid into molecular formula.
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C15H24N2O4
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