Top: Distribution of the line luminosity of various molecular gas tracers along the major axis. A dashed line is drawn to mark offset = 0. Bottom: Similar to the upper figure, but along the minor axis. Given that the inclination angle of the outflow is quite small (∼10°, Leroy et al. 2015), we assume that 1″ along the minor axis associated with the outflow corresponds to a projected distance of about 17 pc, the same as along the major axis.