Complex sentence: From October 1999, Rhône-Poulenc, which became Aventis then Sanofi-Aventis, gradually reduced its stake in Rhodia's capital, before eventually selling all its shares in the company on October 17,2006.
Split into simpler sentences: From October 1999, Rhône-Poulenc, which became Aventis then Sanofi-Aventis, gradually reduced its stake in Rhodia's capital. It sold all its shares in the company on October 17,2006.