A series of novel 7-amide substituted-4-androstene-3,17-dione derivatives(8αa '8αh or 8βa '8βh) was synthesized from the important intermediates 5 b
The carcinoembryonic antigen(CEA) is an oncofetal glycoprotein known as an important clinical tumor marker and is overexpressed in several types of tumors, incl
A solution-phase approach to the synthesis of nano-Se/silk fibroin colloids(NSeSFC) by reducing selenious acid solution with silk fibroin(SF) was proposed, and