Content( HPLC): >98% Loss on drying:<0.5% Impurity A<0.1%,Impurity B<0.1%,Impurity C<0.1%, Other relevant substance<0.2 ... , with special effect on cancer of rectum.[ Structural formula ] [ C A S ]61825-94-3[ Chemical name ][SP-4-2-(1R ... on drying:≤0.5% Relevant impurities( HPLC):Impurity A<0.1%,Impurity B<0.1%,Impurity C<0.1%, Other relevant substance<0.2 ...