Average spectrum obtained with UVES/VLT in January − March 2009 (black line) is compared to the spectrum obtained with HIRES/Keck (grey line) in October 2005. The spectra are deredenned with E_B − V = 0.9 and R_V = 3.1, and smoothed. A synthetic spectrum of a B3 V star, which contributes to the 2005 fluxes, is shown for comparison (blue line). The UVES spectrum was shifted in fluxes by the values corresponding to the average contribution of the B3 V companion in the 2005 spectrum; the value of the shift is 0.21 for the two top panels, and 0.10 for the other panels. Identified atomic spectral features are indicated by red markers, while molecular band-heads are assigned green markers. The ordinate units are 10^-13 erg s^-1 cm^-2 Å^-1.