It looks like a Morus of some kind, but these leaves seem to have much deeper margins then the red, black or white mulberrys.
Morus alba is very variable in leaf shape, from unlobed to very deeply lobed. This one is more deeply lobed than most, but within the range of variation.
Our grafted weeping Morus alba has very small reddish fruits like this and a high proportion of its adult leaves are lobed.
