of the compound of formula ii with hydrazine in an inert solvent such as ethanol a mixture of ethanol and chloroform tetrahydrofuran or aqueous ethanol the reaction temperature may vary from about room temperature to about 100 u00b0 c with reflux temperature of the selected solvent as preferred the product is extracted with dilute mineral acid and thereafter recovered and neutralized a third method which may be utilized to produce the compound of formula iii consists of a base followed by acid hydrolysis of the compound of formula ii for the acid part of the hydrolysis a 30 solution of a mineral acid such as hydrochloric hydrobromic sulfuric or phosphoric acid may be utilized the reaction is run at or about reflux temperature for a base part of the hydrolysis an alkali metal hydroxide such as potassium or sodium hydroxide is utilized inert organic solvents such as those set forth above may be utilized to solubilize the ingredients the reaction is run at or near reflux temperature of the selected solvent the compound of formula iii is thereafter reacted with any conventional nitrating agent for example an alkali metal nitrate such as sodium or potassium nitrate in sulfuric acid the reaction is carried out from about 0 u00b0 c to about room temperature with 0 u00b0 c as preferred the compound of formula v is reduced by utilizing a metal hydride reducing agent such.