甲基 3-氰基-2-羟基-6-甲基异尼古丁酸酯

3-cyano-2-hydroxy-6-methyl-5-nitro-isonicotinic acid methyl ester

2-chloro-3-cyano-6-methyl-5-nitro-isonicotinic acid methyl ester

2-氯-5-羟基-6-甲基-3,4-吡啶二甲酸

6-chloro-4,5-bis-hydroxymethyl-2-methyl-[3]pyridylamine, hydrochloride