.alpha.-Chloropropionic acid methyl ester 17639-93-9 2-Chloropropionic acid methyl ester Methyl .alpha.-chloropropionate Methyl 2-chloropropanoate Methyl 2-chloropropionate NSC70983 Propanoic acid, 2-chloro-, methyl ester Propionic acid, 2-chloro-, methyl ester