cis-hexahydro-1H-cyclopentafuran-1,6-dione

(2S,3R)-3-Hydroxymethyl-2-methanesulfonylmethyl-cyclopentanone

(3aR,6aS)-6a-Methylsulfanylmethyl-tetrahydro-cyclopenta[c]furan-1,6-dione

9',10'-dihydro-5-formylspiroethanoanthracen>-2-one

9',10'-dihydro-5-carboxyspiroethanoanthracen>-2-one