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Fig. 2

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OSIRIS/GTC spectra of four of our targets (spectral resolution of about 300 at 750 nm). The most prominent atomic and molecular absorption features are labeled; the Li i absorption line is indicated by a vertical dotted line. Telluric contribution is removed although some telluric residuals are present at 760.5 nm. The blue wavelengths of G 196–3B and J02410326 spectra are not shown because they are very noisy (e.g., the feature of J02410326 immediately to the blue of the Li i location is likely not real). Note that the relative flux axis is in logarithmic scale. All spectra are normalized to unity at 914–918 nm and are shifted by a constant for clarity.

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