Mergers & acquisitions

InVentiv Health Inc., a Burlington, Mass.-based portfolio company of THL Capital and Liberty Lane Partners, has sold its sample management and fulfillment business to J. Knipper & Co. No financial terms were disclosed.

Rosetta Stone (NYSE: RST) has acquired Livemocha Inc., a Seattle–based online language learning community, for $8.5 million in cash. Livemocha had raised around $14 million in VC funding from firms like August Capital and Maveron LLC.

MedImmune, a unit of AstraZeneca (LSE: AZN), has acquired AlphaCore Pharma, an Ann Arbor, Mich.-based developer of a bloodstream enzyme that helps remove cholesterol from the body. No financial terms were disclosed.

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