the d- and l-isomers of methadone were equipotent inhibitors of aortic contraction . l-acetylmethadol ( 1 x 10 ( -6 ) -1 x 10 ( -5 ) m ) was a potent inhibitor of vascular contraction . l-pentazocine inhibited its own ability to contract the aorta as the dose was raised 3 x 10 ( -5 ) m .
C0025605
methadone
C0025607
acetylmethadol