Left panels: molecular line profiles of ¹²CO, ¹³CO, C¹⁸O, HCO⁺, and HCN toward source 1. The vertical dashed central line corresponds to +4.6 km s^-1. The two remaining vertical dashed lines indicate the velocity range [+2.7, +6.3] km s^-1. Integrated emission maps for the observed molecules (green contours) superposed over the 4.6 μm (grayscale) image. The range of the integrated emission for all molecules is [+2.7,+6.3] km s^-1. The contour levels of the ¹³CO are between 4 and 47 K km s^-1. The contour levels of C¹⁸O have values between 1.9 and 13.2 K km s^-1, while the contours of HCO⁺ and HCN are between 0.8−7.8 K km s^-1 and 1.1−4.1 K km s^-1, respectively. Herschel maps at 500 a), 350 b), 250 c), and 70 μm d) are superimposed in white contours. The white cross indicates the IRAS source position, and the red arrows indicate the location of the identified sources. The HPBW is shown in the lower right corner of each panel. Right panels: molecular line profiles toward source 3. The vertical dashed central line corresponds to +4.0 km s^-1. Integrated emission maps of the observed molecules (green contours) superposed onto the 4.6 μm (grayscale) image. The integration range for all molecules is [+3.0, +4.0] km s^-1. The velocity range is indicated by the green bar. The contour levels of the CO are between 6.4 and 8.0 K km s^-1. The contours levels of ¹³CO have values between 4.5 and 6.5 K km s^-1, while the contours of C¹⁸O and HCO⁺ are between 1.2−2.3 K km s^-1 and 0.7−1.1 K km s^-1, respectively.