- a yellowish, fragrant, flammable liquid, C5H11NO2, used in medicine chiefly as a vasodilator, especially in the treatment of angina pectoris: misused by inhalation as a stimulant, especially of sexual sensation.
- a yellowish unstable volatile fragrant liquid used in medicine as a vasodilator and in perfumes. Formula: (CH 3) 2 CHCH 2 CH 2 NO 2
