333266 PA procainamide 125 1395472 PCA procainamide 16 3290793 PROC procainamide 6 3290699 ProA procainamide 5 3990849 ProcA procainamide 3 1381914 PAD procainamide 2 3202388 PADE procainamide 1 342421 Pd procainamide 1 363125 Pr procainamide 1