(1R)-1-[6-amino-5-(dihydroxyamino)-2-hydroxypyridin-3-yl]-1,4-anhydro-2-deoxy-5-O-[(S)-hydroxy{[(S)-hydroxy(phosphonooxy)phosphoryl]oxy}phosphoryl]-D-erythro-pentitol

P19821 — DNA polymerase I, thermostable