Fig. 1.
Chemical structures. Aconitine (molecular weight: 645.7) is shown on theleft, bulleyaconitine A (643.8) is shown in themiddle, and lidocaine (234.3) is shown on theright. The differences between aconitine and bulleyaconitine A are labeled with anasteriskat three positions. All compounds contain a tertiary amine and a phenyl moiety. Lidocaine, however, is less than half the size of aconitine or bulleyaconitine A.