7a-hydroxy-3,6-dimethyl-4,5,6,7-tetrahydrobenzofuran-2-one

7a-hydroxy-3,6-dimethyl-4,5,6,7-tetrahydro-1-benzofuran-2-one

5,6,7,7a-Tetrahydro-7a-hydroxy-3,6-dimethylbenzofuran-2(4H)-one

3,6-dimethyl-7a-hydroxy-5,6,7,7a-tetrahydrobenzofuran-2(4H)-one