STRUCTURE ACTIVITY RELATIONSHIP OF 3-NITRO-2,4,6-TRIHYDROXYBENZAMIDE DERIVATIVES IN PHOTOSYNTHETIC ELECTRON-TRANSPORT INHIBITION

Quantitative structure—activity relationship (QSAR) analyses of the 3-nitro-2,4,6-trihydroxybenzamide and thioamide derivatives in the inhibition of photosynthetic electron transport (PET) revealed that the activity would depend largely on the overall lipophilicity of the molecules, and their mode of inhibition would be similar to those of the 3-acyl analogues. However, some of the compounds had higher pI50 values than those estimated by the equations obtained from the QSAR analysis, indicating that those compounds may bind to the site in a more specific manner than the others would do.