Top three continuum-subtracted spectra are extracted for HCN, CH3OH and HCO+ toward the central peak position (offset 0.1″/−0.2″). Bottom spectrum: the HCO+ spectra from the blue- and red-shifted outflow peak positions presented in Fig. 2 (offsets positions 0.33″/0.18″ and −0.18″/−0.48″, respectively).
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