» Trisulfapyrimidines Tablets contain not less than 95.0 percent and not more than 105.0 percent of the labeled amount of each of the sulfapyrimidines, consisting of equal amounts of sulfadiazine (C₁₀H₁₀N₄O₂S), sulfamerazine (C₁₁H₁₂N₄O₂S), and sulfamethazine (C₁₂H₁₄N₄O₂S).