Sanofi (SNY) has entered into exclusive negotiations with U.S.-based private equity company Clayton Dubilier & Rice (CD&R) for the potential sale of a 50% controlling stake in its consumer healthcare (CHC) business unit, Opella.Per the terms of the deal, Sanofi will remain a significant shareholder of Opella. In addition, the French investment bank, Bpifrance, is likely to hold a 2% stake and become a minority shareholder in Opella.The transaction is expected to close at the earliest in the second quarter o ...