Compounds Containing Nitrogen

A compound having molecular formula \(\mathrm{C}_4 \mathrm{H}_{11} \mathrm{N}\), reacts with \(\mathrm{CHCl}_3\) in alcoholic \(\mathrm{KOH}\), on heating, to form a compound with a foul smell. Identify the optically active isomer of the compound which also shows the above reaction.