33405-80-0 4(1H)-Pteridinone, 2-amino-5,6,7,8-tetrahydro-6-(2-hydroxy-1-oxopropyl)-, (S)- 6-1'-Oxo-2'-hydroxypropyl tetrahydropterin 6-Lactoyl tetrahydropterin 6-Lactoyltetrahydropterin Lactoyl-H4-pterin Lactoyl-PH4