2-amino-6-((1S,2R)-1,2,3-trihydroxypropyl)pteridin-4(3H)-one-13C5;2-Amino-6-[(1S,2R)-1,2,3-trihydroxypropyl]-4(3H)-pteridinone-13C5; Neopterin-13C5; 2-Amino-4-hydroxy-6-(1,2,3-trihydroxypropyl)pteridine-13C5; 2-Amino-6-((1S,2R)-1,2,3-trihydroxypropyl)-4(8H)-pteridone-13C5; 6-D-erythro-Neopterin-13C5; D-(+)-Neopterin-13C5; D-erythro-Neopterin-13C5;D-Neopterin-13C5
