CAS Number: 1189707-81-0
Chemical Name: Mefenamic Acid-d3 (major)
Molecular Formula: C15H12D3NO2
Molecular Weight: 244.30

CAS Number: 1216745-79-7
Chemical Name: Mefenamic-d4 Acid
Molecular Formula: C15H11D4NO2
Molecular Weight: 245.31