Spectral regions of several candidates with high-quality spectra showing lines of interest with respect to the chemical nucleosynthesis. From bottom to top, spectra are sorted in approximate order of increasing effective temperature. The presence or absence of the C II λ4267 in the various spectra and the strength of nitrogen lines indicates non-solar chemistry. The RV-variable spectra have been shifted to line up their spectral features. With the exception of LB-1 (UVES) and HR 6819 (FEROS), all spectra were obtained with ARCES. See Figs. A.2 and A.3 for more comprehensive plots.