You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (E)-but-2-enedioic acid;N-[1-[4-(3,4-dimethoxyphenoxy)butyl]piperidin-4-yl]-N-methyl-4H-3,1-benzothiazin-2-amine by IUPAC nomenclature, provide its molecular formula.
user
C30H39N3O7S
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