Private equity firm 21 Partners is buying Synerlab for an undisclosed amount.

Synerlab, headquartered in Erstein, France, manufactures pharmaceuticals.

Synerlab will be sold by private equity firm Ardian, which will reinvest in the company to support Synerlab’s European development.

The target has been backed by 21 Partners and Ardian, formerly Axa Private Equity, since 2007.

On Nov. 18, Ardian announced that in partnership with Consilium SGR, a private equity firm, it sold Rollon Group to Chequers Capital and IGI SGR. Milan, Italy-based Rollon manufactures linear rails and actuators used for railways, aeronautics, logistics, packaging, machine tools and medical equipment. Ardian and Consoilium had acquired a majority stake in Rollon in 2010.

Other recent pharmaceutical deals include Endo Health Solutions Inc.’s deal to buy Paladin Labs Inc., and Chiesi Farmaceutici SpA’s purchase of Cornerstone Therapeutics Inc.