You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (1S,2S,6S,7S)-4-[(Z)-(2,5-dimethoxyphenyl)methylideneamino]-4-azatricyclo[5.2.2.02,6]undec-8-ene-3,5-dione by IUPAC nomenclature, provide its molecular formula.
user
C19H20N2O4
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