英文别名2H-Cyclopenta[b]furan-2-one, 3,3a,6,6a-tetrahydro-, (3aR,6aS)-rel-; (3aR,6aS)-rel-2H,3H,3aH,6H,6aH-cyclopenta[b]furan-2-one; cis-2-Hydroxy-4-cyclopentene-1-acetic acid lactone; (3aR,6aS)-rel-3,3a,6,6a-Tetrahydro-2H-cyclopenta[b]furan-2-one; (-)-(1S,5R)-2-oxabicyclo[3.3.0]oct-6-en-3-one; Prostaglandin Impurity 9; cis-(-)-3,3a,6,6a-tetrahydro-2H-cyclopenta[b]furan-2-one; (3aR,6aS)-3,3a,6,6a-tetrahydro-2H-cyclopenta[b]furan-2-one; (-)-1(S),5(R)-2-oxabicyclo[3,3,0]oct-6-en-3-one; (1S,2R)-2-oxabicyclo[3.3.0]octa-6-en-3-one; (-)-(1S,5R)-2-oxabicyclo[3.3.0]-oct-6-en-3-one; (-)-(3aR,6aS)-3,3a,6,6a-tetrahydro-2H-cyclopenta[b]furan-2-one; (3aR,6aS)-3,3a,6,6a-Tetrahydro-cyclopenta[b]furan-2-one; (+)-(1R,5S)-2-Oxabicyclo[3.3.0]oct-6-en-3-one 
