The invention relates to new chemical compounds acting on the serotonin transporter (SERT), and associated pharmaceutical compositions, methods for use as therapeutic agents, and methods of preparation thereof. In particular the new chemical compounds are useful for the treatment of a variety of central nervous system (CNS) disorders—for example anxiety, depression, epilepsy, obsessive-compulsive disorders, migraine, cognitive disorders, sleep disorders, feeding disorders, panic attacks, disorders related to withdrawl from drug abuse, schizophrenia, or the like, or in the treatment of gastrointestinal disorders such as irritable bowel syndrome.