Combine sugar, oregano, parsley, onion salt, cayenne, paprika, and flour in bowl and blend thoroughly. Wash chicken pieces thoroughly and coat with flour mixture. Melt butter and pour into baking pan. Arrange chicken pieces in pan and sprinkle with half of sesame seeds. Bake at 350° for 30 minutes. Turn pieces over, dust with flour mixture, and then sprinkle with remaining seeds. Bake 30 minutes longer, until chicken is tender and crust is crisp.