Aminoacids, other than those containing more than one kind of oxygen function, and their esters; salts thereof
Anthranilic acid and its salts
Glutamic acid and its salts
Lysine and its esters; salts thereof
Aminoacids and their esters; salts thereof (excl. those with > one kind of oxygen function, lysine and its esters, and salts thereof, and glutamic acid, anthranilic acid, tilidine "inn", and salts thereof)