An EC 3.6.3.* (acid anhydride hydrolase catalysing transmembrane movement of substances) inhibitor that inhibits H+/K+-exchanging ATPase, EC 220.127.116.11. Such compounds are also known as proton pump inhibitors.
A xenobiotic (Greek, xenos "foreign"; bios "life") is a compound that is foreign to a living organism. Principal xenobiotics include: drugs, carcinogens and various compounds that have been introduced into the environment by artificial means.