3d image of norephedrine skeletal formula

norephedrine c9h13no sympathomimetic agent decongestant appetite suppressant phenylpropanolamine ppa synthesis birth control ephedrine hydrochloride function salt drug norpseudoephedrine beta sigma norepinephrine stimulant banned controlled hydroxyamphetamine amphetamine cathine methamphetamine cathinone 3d chemistry chemical biochemistry molecule molecular structural structure formula compound component reaction metabolism biosynthesis mechanism narcotic dope addict addiction