1.3.8.3 (R)-2-benzylsuccinyl-CoA + electron-transfer flavoprotein - 1.3.8.3 (R)-2-benzylsuccinyl-CoA + electron-transferring flavoprotein - 1.3.8.3 (R)-2-benzylsuccinyl-CoA + electron-transferring flavoprotein involved in anaerobic toluene oxidation to benzoyl-CoA