4-[({3-HYDROXY-2-METHYL-5-[(PHOSPHONOOXY)METHYL]PYRIDIN-4-YL}METHYL)AMINO]THIOPHENE-2-CARBOXYLIC ACID Cc1c(c(c(cn1)COP(=O)(O)O)CNc2cc(sc2)C(=O)O)O PSZ