a quantitative high-performance liquid chromatographic method , using a polystyrene-divinyl benzene ( hitachi no . 3010 gel ) column and aqueous methanol as the mobile phase , was employed for the determination of aminopyrine and its related compounds , 4-acetyl-aminoantipyrine , 4-aminoantipyrine and 4-monomethylaminoantipyrine .
C0002586
aminopyrine
C0002696
4-aminoantipyrine