pH 4.01 buffer solution (box of 25x20mL sachet)

Mesosulfuron-methyl, 100mg

O-Desmethyl tramadol-d6 (racemic) , 100µg base/mL, Solvent-methanol, Unit 1mL, # of units-5, Cas.no. 16412-54-7

D4-Estrone, 10mg