Zoom in of all detected and tentatively detected lines for HC₃H, H¹³CCCN, HC¹³CCN, HCC¹³CN, HC₅H, and HC₇H. The corresponding rest frequency in MHz is shown in the upper right of each panel. Weak lines have been smoothed to have a channel width of 3.0–3.6 km s^-1, and are marked with “smoothed” in the upper left of the corresponding panels. Otherwise, the channel width is 1.5–2.1 km s^-1. The blue dashed lines of the blended transitions trace the systematic LSR velocity (26.5 km s^-1) of IRC +10216.