(4R,5S)-5-(2,2-dichloroethyl)-4-methyldihydrofuran-2(3H)-one 2(3H)-furanone, 5-(2,2-dichloroethyl)dihydro-4-methyl-, (4R,5S)- InChI=1/C7H10Cl2O2/c1-4-2-7(10)11-5(4)3-6(8)9/h4-6H,2-3H2,1H3/t4-,5+/m1/s