  The origin of the molecular clouds orbiting SgrA* is one of the most debated
questions about our Galactic Centre. Here, we present the hydrodynamic
simulation of a molecular cloud infalling towards SgrA*, performed with the
adaptive-mesh-refinement code RAMSES. Through such simulation, we propose that
the circumnuclear disc and the +20 km/s cloud originated from the same tidal
disruption episode, occurred less than 1 Myr ago. We also show that recent star
formation is to be expected in the +20 km/s cloud, as also suggested by recent
observations.
