(4S,6s)-5,6-dihydro-6-methyl-4h-thieno[2,3-b]thiopyran-4-ol 7,7-dioxide

n.a

(4R,6S)-6-Methyl-7,7-dioxo-5,6-dihydro-4H-thieno[2,3-b]thiopyran-4-ol

n.a

Benzylfentanyl

research compound

[1-(2-Phenylethyl)-1h-imidazol-2-yl]-4-piperidinylmethanone dihydrobromide

Alcaftadine impurity reference standard