. . "Laevulinic Acid"@en . . . . "Bernard Capai, Guy Lartigau, \"Preparation of laevulinic acid.\" U.S. Patent US5175358, issued December, 1939."@en . . . . . . . . "123-76-2"@en . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "experimental"@en .