3-[(4,5-Difluoro-2-benzothiazolyl)methyl]-3,4-dihydro-4-oxophthalazine-1-acetic acid C??? ??, ??, ??

3-[(4,5-Difluoro-2-benzothiazolyl)methyl]-3,4-dihydro-4-oxophthalazine-1-acetic acid ?? ?? ? ???

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3-[(4,5-Difluoro-2-benzothiazolyl)methyl]-3,4-dihydro-4-oxophthalazine-1-acetic acid ?? ??