(3AS,6AR)-TETRAHYDRO-4-METHOXYFURO[3,4-B]FURAN-2(3H)-ONE;Tetrahydro-4-methoxy-(3aS,6aR)-Furo[3,4-b]furan-2(3H)-one;4-methoxytetrahydrofuro[3,4-b]furan-2(3H)-one;(3S,6R)-Tetrahydro-4-Methoxyfuro[3,4-b]furan-2(3H)-one