133774-80-8 3A,4,5,6a-Hexahydro-2-oxo-4-(3-oxo-5-(3-pyridyl)-1-pentenyl)-2H-cyclopenta(b)furan-5-yl(1,1'-biphenyl)-4-carboxylate 3Aalpha,4alpha(E),5beta,6aalpha-Hexahydro-2-oxo-4-(3-oxo-5-(3-pyridyl)-1-pentenyl)-2H-cyclopenta(b)furan-5-yl(1,1'-biphenyl)-4-carboxylate Hexahydro-oxolactone