Recent surveys uncovered new Young Massive Clusters ( YMCs ) that host dozens of Red Supergiants ( RSGs ) in the inner Milky Way .
These clusters are ideal for studying the most recent and violent star formation events in the inner Galaxy .
However , due to the high extinction that affects the Galactic plane , they need to be studied through infrared ( IR ) spectroscopy .
IR spectra of RSGs have proven to be powerful tools for obtaining chemical abundances . We present the first [ Fe / H ] measurement ( - 0.07 \pm 0.02 ) for the YMC VdBH 222 through analysis of its RSGs using VLT/X-shooter spectra .
We find no evidence for Multiple Stellar Populations ( MSPs ) in this YMC , contrary to what is routinely observed in older massive clusters .