A series of ring-substituted hallucinogenic amphetamines was analyzed using molecular connectivity, and a correlating equation was found between potency and connectivity terms. The equation allows interpretation of structure-activity relationships (SAR) and can predict potency for amphetamines not in the original list, as well as for mescalines and tryptamines.
The hallucinogenic potency of ten mescaline analogs was analyzed using molecular connectivity. A two-term equation based on structural variation explained 94% of the variance in activity. Substitutions at the 2,5-dimethoxy positions and the nature of the 4-position substituent were important determinants of potency. The equation also made reasonable potency predictions for six additional compounds not included in the original analysis.