1,1-cyclopropanediacetic acid, alpha~1~-chloro-, 1-(1,1-dimethylethyl) 1-methyl ester InChI=1/C12H19ClO4/c1-11(2,3)17-8(14)7-12(5-6-12)9(13)10(15)16-4/h9H,5-7H2,1-4H methyl [1-(2-tert-butoxy-2-oxoethyl)cyclopropyl](chloro)acetate