6(R)-Pyruvoyltetra-hydropterin

1,2-Propanedione, 1-(2-amino-1,4,5,6,7,8-hexahydro-4-oxo-6-pteridinyl)-(R)

1,2-Propanedione, 1-[(6R)-2-amino-3,4,5,6,7,8-hexahydro-4-oxo-6-pteridinyl]-

1-[(6R)-2-amino-4-oxo-5,6,7,8-tetrahydro-1H-pteridin-6-yl]propane-1,2- dione