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Caption : fig. s1: chemical structure of bus.

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Caption : fig. s2: the obtained nitrogen adsorption/desorption isotherms for (a) the proposed mip of bus and (b) its corresponding nip.

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Caption : fig. s3: linear relationship between bus concentration and opd absorbance.

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Caption : fig. s4: colorimetric responses of bus and other species towards bus nanozyme.