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Home › 7,7′-dihalo-3,3,3′,3′-tetramethyl-1,1′-spirobiindane and preparation method thereof

7,7′-dihalo-3,3,3′,3′-tetramethyl-1,1′-spirobiindane and preparation method thereof

US Patent 11866393 · Granted Jan 9, 2024

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