Oseltamivir Impurity B

?2-[(2-Aminophenyl)amino]-5-methyl-3-thiophenecarbonitrile;Olanzapine Impurity ;2-(2-Aminoanilino)-5-methylthiophene-3-carbonitrile;2-(2-Aminoanilino)-5-methylthiophene-3-carbonitrile;