U200 Reserpine U201 Resorcinol U202 Saccharin, & salts U203 Safrole U204 Selenious acid U204 Selenium doixide U205 Selenium sulfide U205 Seleium sulfide SeS2(R,T) U015 L-Serine, diazoacetate (ester) See Silvex (2,4,5-TP) F027 U206 Streptozotocin U103 Sulfuric acid, dimethyl ester U189 Sulfur phosphide (R) See 2,4,5-T F027 U207 1,2,4,5-Tetrachlorobenzene U208 1,1,1,2-Tetrachloroethane U209 1,1,2,2-Tetrachloroethane
U200 Reserpine U201 Resorcinol U202 Saccharin, & salts U203 Safrole U204 Selenious acid U204 Selenium doixide U205 Selenium sulfide U205 Seleium sulfide SeS2(R,T) U015 L-Serine, diazoacetate (ester) See F027 Silvex (2,4,5-TP) U206 Streptozotocin U103 Sulfuric acid, dimethyl ester U189 Sulfur phosphide (R) See F027 2,4,5-T U207 1,2,4,5-Tetrachlorobenzene U208 1,1,1,2-Tetrachloroethane U209 1,1,2,2-Tetrachloroethane