zopiclone insomnia drug sleeping pill, z-drug molecule. conventional skeletal formula and stylized representations.

addiction addictive atomic atoms bond cancer carbon carcinogenic chemical chemistry chlorine circle composition compound conventional cyclopyrrolone dependence drawing driving drug eszopiclone formula gaba hydrogen hypnotic influence insomnia line model molecular molecule nitrogen overdose oxygen pill representations ring sedative skeletal sleeping structure stylized tolerance vector zdrug zopiclon zopiclone