Shares of Natco Pharma and Den Networks may see buying interest, as the Foreign Investment Promotion Board on Thursday approved their FDI proposals. Natco Pharma’s ₹1,036-crore proposal and Den Networks’ proposal to hike FII buying limit to 74 per cent from 49 per cent received FIPB nod. However, proposals from Reliance Globalcom, Bermuda, to purchase an Indian owned firm and Eros International Media’s limited liability partnership were deferred.