title: [Chemical analysis of the rare components of gallstones. (1). Identification of L-cystine by GC/MS or other methods].
mesh_terms: D002769:Cholelithiasis / Q000378:metabolism*; D002845:Chromatography; D003553:Cystine / Q000032:analysis* / Q000302:isolation & purification; D005260:Female; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D008875:Middle Aged
chemical_list: D003553:Cystine