in the oxidized and deproteinized blood fractions ( plasma , white cells , and erythrocytes ) nine pteridines ( pterin-6-carboxylic acid , xanthopterin , neopterin , monapterin , isoxanthopterin , lumazine , biopterin , 6-hydroxymethylpterin , and pterin ) were quantified after their separation by reverse-phase high-performance liquid chromatography with fluorescence detection at exc/em = 360/460 nm .
C0068527
neopterin
C0005562
biopterin