1 6DF [6-methyl-5-oxidanyl-4-[(~{E})-[(1~{R})-1-phenylethyl]iminomethyl]pyridin-3-yl]methyl dihydrogen phosphate 1.000 2 A1BGC {5-hydroxy-6-methyl-4-[(E)-{[(pyridin-2-yl)methyl]imino}methyl]pyridin-3-yl}methyl dihydrogen phosphate 0.880 3 ELP (1r)-1-[((1e)-{3-hydroxy-2-methyl-5-[(phosphonooxy)methyl]pyridin-4-yl}methylene)amino]-1-phenylethylphosphonic acid 0.857