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Phosphatase-IN-1 (compound II-8), a propranolol derivative, acts as an inhibitor of phosphatidate phosphatase (Pah). It binds to MoPah1 with an affinity constant of 19.8 μM, demonstrating growth inhibition of plant pathogens and anti-fungal properties. Notably, Phosphatase-IN-1 exhibits no toxicity towards rice seedlings and wheat heads [1].