8-oxabicyclo[3.2.1]oct-6-en-3-one, 2,4-dichloro-, (1R,2S,4R,5S)- InChI=1/C7H6Cl2O2/c8-5-3-1-2-4(11-3)6(9)7(5)10/h1-6H/t3-,4+,5+,6 rel-(1R,2S,4R,5S)-2,4-dichloro-8-oxabicyclo[3.2.1]oct-6-en-3-one