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Sparsely distributed corals in eastern Cane Bay, St. Croix. (Karl Wirth)

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In charting the “drug-likeness”,  tight clusters indicate chemical similarity. Smaller bunches and free-floating dots indicate a lot of chemical variation. The closer the compounds are to a QED value of 1, meaning they are the most druglike. [Credit:G.R. Bickerton et al/Nature Chemistry 2012]

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