trans-(6-carboxyhex-2(Z)-enyl)-3-(hydroxymethyl)cyclopentanone methyl ester

trans-2-<6-(methoxycarbonyl)hex-2(Z)-enyl>-3-formylcyclopentanone

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

(3aS,6aS)-Tetrahydro-cyclopenta[c]furan-1,6-dione 6-(O-methyl-oxime)

3-hydroxymethyl-2-methylcyclopentanone