2H-Pyran-2-carboxylic acid, tetrahydro-6-hydroxy-, gamma-lactone 5-19-04-00085 (Beilstein Handbook Reference) 5257-20-5 6,8-DIOXABICYCLO(3.2.1)OCTAN-7-ONE 6-Hydroxytetrahydropyran-2-carboxylic acid lactone 7,8-Dioxabicyclo(3.2.1)octan-6-one BRN 0115928 EINECS 226-061-5 NSC 55666 Pyran-2-carboxylic acid, tetrahydro-6-hydroxy-, gamma-lactone