» Rifampin and Isoniazid Capsules contain not less than 90.0 percent and not more than 130.0 percent of the labeled amount of rifampin (C₄₃H₅₈N₄O₁₂) and not less than 90.0 percent and not more than 110.0 percent of the labeled amount of isoniazid (C₆H₇N₃O).