You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(Z)-[[(3S)-2,3-dihydro-1,4-benzodioxine-3-carbonyl]hydrazinylidene]methyl]-6-methoxy-4-nitrophenolate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H14N3O7-
assistant