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ETHYL ESTERS OF 2-(OMEGA-BROMOALKYL) CYCLOPENTANONE-3-CARBOXYLIC ACID AS STARTING PRODUCTS FOR SYNTHESIS OF BIOLOGICALLY ACTIVE PROSTAGLANDINS OR THEIR ANALOGS AND METHOD FOR PREPARING THE SAME
ETHYL ESTERS OF 2-(OMEGA-BROMOALKYL) CYCLOPENTANONE-3-CARBOXYLIC ACID AS STARTING PRODUCTS FOR SYNTHESIS OF BIOLOGICALLY ACTIVE PROSTAGLANDINS OR THEIR ANALOGS AND METHOD FOR PREPARING THE SAME