104314-69-4
2-methoxycarbonylmethyl-4-benzoyloxy-2-cyclopenten-1-one
→
104314-71-8
methyl 2-oxo-4-cyclopentenylideneacetate
104314-70-7
2-carboxymethyl-4-benzoyloxy-2-cyclopenten-1-one
104314-72-9
methyl 2-oxo-3-cyclopentenylideneacetate