You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 5-[(E)-3-[(4aR,8aS)-3,4,4a,5,6,7,8,8a-octahydro-1H-isoquinolin-2-yl]-3-oxoprop-1-enyl]-2-methoxy-N,N-dimethylbenzenesulfonamide is given. What is its corresponding molecular formula?
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C21H30N2O4S
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