Sigma-Aldrich
sec-butyl dichloroacetate
Shigemi 3 mm Symmetrical NMR microtube assembly
SigmaPrepTM spin column kit with break-away tip
SigmaPrepTM 离心柱套装
Silicon carbide
碳化硅
Silicone Elastomer, Rod, Diameter 2.0Mm, Length 5 M, Color White
Silver