Category starting in alphabetical order :

Allopurinol

Allopurinol EP Impurity A;
Allopurinol EP Impurity A;
CAS No. : 27511-79-1 (free base) ;
Molecular Formula :

C4H6N4O (free base) ; C4H6N4O . ½ H2SO4 ;

Allopurinol EP Impurity B;
Allopurinol EP Impurity B;
CAS No. : 22407-20-1 ;
Molecular Formula :

C5H6N4O2 ;

Allopurinol EP Impurity C;
Allopurinol EP Impurity C;
CAS No. : 1346604-13-4 ;
Molecular Formula :

C6H6N6O ;

Allopurinol EP Impurity D;
Allopurinol EP Impurity D;
CAS No. : 6994-25-8 ;
Molecular Formula :

C6H9N3O2 ;

Allopurinol EP Impurity E;
Allopurinol EP Impurity E;
CAS No. : 31055-19-3 ;
Molecular Formula :

C7H9N3O3 ;

Allopurinol Nitrile Impurity;
Allopurinol Nitrile Impurity;
CAS No. : 16617-46-2 ;
Molecular Formula :

C4H4N4 ;

Allopurinol USP RC F;
Allopurinol USP RC F;
CAS No. : 321571-07-7 ;
Molecular Formula :

C12H14N4O4 ;

Allopurinol;
Allopurinol;
CAS No. : 315-30-0 ;
Molecular Formula :

C5H4N4O ;