Integrated CO emission distribution in the velocity range from –53 to –40 km s^-1. Contour level is at 2.0 K. The location of the cYSOs are indicated with different symbols according to the catalogue where they were found: MSX: circles; IRAS: asteriscs; WISE: plus signs correspond to Class I objects and crosses correspond to Class II. Red and blue indicate objects in which direction there is just one CO component or more than one, respectively.