Portion of the spectrum of D25_6334. The observed spectrum is shown with black dots, and the best-fit synthetic spectra are shown with red lines. The shaded regions show spectra computed with the abundance of the element of ±0.2 dex from the best-fit. The gray lines in the middle two panels show the synthetic spectra with extremely low abundances of C and N, respectively. Note that while spectral fitting was done in LTE, non-LTE correction was applied to Na and Al abundances.