How many of the following are the derivatives of Barbituric acid? 
 Veronal, amytal, Nembutal, Iuminal, Seconal, dimetane, Iproniazid 
 

The derivatives of Barbituric acid are known as “Tranquilizers”.
The ones which are used most commonly.
i) Veronal ii) Seconal iii) Luminal  iv) Nembutal  v) Amytal…etc
These drugs are also called psychotherapeutic-drugs. They are used as hypnotics, sedatives and anesthetics, though they are known as ‘Sleeping pills’ used as Anxiolytics.