2-Chloro-5-nitrobenzoic acid methyl ester 4-09-00-01228 (Beilstein Handbook Reference) 6307-82-0 BENZOIC ACID, 2-CHLORO-5-NITRO-, METHYL ESTER BRN 1966320 Methylester kyseliny 2-chlor-5-nitrobenzoove [Czech]