2-amino-4-hydroxy-6-(erythro-1,2,3-trihydroxypropyl dihydropteridine triphosphate 6-(L-erythro-1,2-Dihydroxypropyl 3-triphosphate)-7,8-dihydropterin 6-1S2R-12-DIHYDROXY-3-TRIPHOSPHOOXY 6-[(1S,2R)-1,2-dihydroxy-3-triphosphooxypropyl]-7,8-dihydropterin