89-8741-46 "Methylergometrine for system suitability, European Pharmacopoeia (EP) Reference Standard" CAS No:57432-61-8 Y0000777
[Sigma Aldrich Japan(Sigma-Aldrich)] "Methylergometrine for system suitability, European Pharmacopoeia (EP) Reference Standard" Y0000777 CAS No:57432-61-8