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Sildenafil imp. d (pharmeuropa)

Sotalol hydrochloride imp. a (ep) as hydrochloride

Strychnine nitrate

Strychnine n-oxide hydrochloride

N-[(4-aminophenyl)sulfonyl]-n-(pyrimidin-2-yl)acetamide (acetylsulfadiazine)

Sulfamethylphenazole

Sulpiride imp. g (ep)

5-Sulphamoylsalicylic acid

Tamoxifen citrate imp. b (ep)

Tamoxifen citrate imp. c (ep) e-isomer