(May 23, 2019, 10:23 AM EDT) -- NEW ORLEANS — Ukraine’s largest oil company on April 18 filed an opening brief in the Fifth Circuit U.S. Court of Appeals in its appeal of a district court’s confirmation of a $145.7 million award, arguing that the court lacked removal jurisdiction (OJSC Ukrnafta v. Carpatsky Petroleum Corp., et al., No. 19-20011, 5th Cir.)....