3,5-Methano-2H-cyclopenta[b]furan-7-carboxylic acid, hexahydro-2-oxo-, (3.alpha.,3a.beta.,5.alpha.,6a.beta.,7S*)- 3,5-Methano-2H-cyclopenta[b]furan-7-carboxylic acid, hexahydro-2-oxo-, stereoisomer 4582-20-1 NSC167451