.alpha.-Bromomalonic ester 685-87-0 Bromomalonic acid diethyl ester Diethyl .alpha.-bromomalonate Diethyl 2-bromomalonate Diethyl bromomalonate Ethyl bromomalonate Malonic acid, bromo-, diethyl ester NSC1985 Propanedioic acid, bromo-, diethyl ester