Fig. 4From: From non-targeted to targeted GC–MS metabolomics strategy for identification of TCM preparations containing natural and artificial muskSpecific identification of prasterone (A) and androsterone (B) in compound Pien Tze Huang Buccal tablets, Pien Tze Huang Unguentum Compositum and Pien Tze Huang Hemorrhoids Ointment CompositumBack to article page