In a medium bowl combine the garlic, prunes, olives, capers, olive oil, vinegar, bay leaves, oregano, salt and pepper. Mix well. Spread mixture in the bottom of a baking dish. Add the chicken pieces, stir and turn to coat. Cover and refrigerate overnight.
When ready to prepare, preheat oven to 180 degrees C. Remove dish from refrigerator. Sprinkle brown sugar on top and pour white wine all around chicken.
Bake in preheated oven for 1 hour, spooning juices over chicken several times as it is baking. Serve on a platter, pouring juices over the top then garnish with fresh parsley.