Sih J C, Graber D R
Prostaglandins. 1978 Sep;16(3):411-6. doi: 10.1016/0090-6980(78)90219-8.
Ozonolysis of 6-oxo-PGF1alpha, 11,15-diacetate, methyl acetal, methyl ester followed by oxidative workup and treatment with diazomethane gave 3-acetoxy-5-hydroxy-2-(methoxycarbonyl) cyclopentane acetic acid, gamma-lactone and dimethyl 3-acetoxy-5[[-(methoxycarbonyl)valeryl]oxy]-1,2-cyclopentane dicarboxylate as two of the major products. The mass spectral properties of the latter compound were identical with those previously published by other investigators.