89-8731-65 "3-Ethyl 5-methyl 2-(2-aminoethoxymethyl)-4-(2-chlorophenyl)-6-methylpyridine-3,5-dicarboxylate oxalate salt, certified reference material, TraceCERT(R), Manufactured by: Sigma-Aldrich Production GmbH, Switzerland" PHR9165-50MG CAS No:1216406-90-4 PHR9165
[Sigma Aldrich Japan(Supelco)] "3-Ethyl 5-methyl 2-(2-aminoethoxymethyl)-4-(2-chlorophenyl)-6-methylpyridine-3,5-dicarboxylate oxalate salt, certified reference material, TraceCERT(R), Manufactured by: Sigma-Aldrich Production GmbH, Switzerland" PHR9165-50MG CAS No:1216406-90-4