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A pair of novel enantiomeric naphthohydroquinone dimers with an unprecedented spiro[4.5] carbon core, (±)-rubioncolin D (1), were isolated from Rubia oncotricha. The racemic mixture of 1 was separated by chiral column chromatography. Their structures and stereochemistry were elucidated by extensive spectroscopic analysis and electronic circular dichroism calculation. Both compounds (+)-1 and (−)-1...
A β-cyclodextrin derivative (AnCD) with the diamino anthracene was presented and studied, which can distinguish AMP from ADP and ATP via fluorescence titration.
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