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4,4′-Bipyridine (abbreviated to 4,4′-bipy or 4,4′-bpy) is an organic compound with the formula (C 5 H 4 N) 2. It is one of several isomers of bipyridine. It is a colorless solid that is soluble in organic solvents. is mainly used as a precursor to N,N′-dimethyl-4,4′-bipyridinium [(C 5 H 4 NCH 3) 2] 2+, known as paraquat.
For about 4 servings, you’ll need: 8 country-style pork ribs (about 2 1/2 pounds) 1 tablespoon salt. 1 teaspoon freshly ground black pepper. 2 1/2 cups barbecue sauce, divided.