sentence1: Azaloxan ( CGS-7135A ) is a medication that was patented by Ciba-Geigy in the early 1980s as an antidepressant , but was never marketed .
sentence2: Azaloxan ( CGS-7135A ) is a drug which was marketed as an antidepressant by Ciba-Geigy in the early 1980s , but was never patented .