(Tert-butyl 3-iodo-1H-pyrrolo2

Determination of Sulfur Amino Acids, Glutathione, and Related Aminothiols in Biological Samples by Gas Chromatography with Flame Photometric Detection

and lack sensitivity. GC methods based on the conversion into trimethylsilyl (4 ,5 ), neopentylidine (6 ), and N-trifluoroacetyl n -butyl ester (7 ) derivatives lack sensitivity, gives a tailing peak and requires anhydrous derivatization conditions

Synthesis of Peptidomimetic Conjugates of Cyclic Nucleoside Phosphonates

to 200 mesh, 1% cross‐linked, typical loading 1.0 to 1.8 mmol/g; Aldrich) Methyl O‐[tert‐butyl(dimethyl)silyl]‐(L )‐serinate ( S.6 a , see protocol

正相色谱和方向色谱

是以硅胶为基质，表面键合有极性相对较弱官能团的键合相。反向色谱所使用的流动相极性较强，通常为水、缓冲液与甲醇、乙腈等的混合物。样品流出色谱柱的顺序是极性较强的组分最先被冲洗出，而极性弱的组分会在色谱柱上有更强的保留。 　　常用的反向填料有：C18（ODS）、C8（MOS）、C4（Butyl）、C6H5（Phenyl）等。