1 EM2 (6-ethynyl-4-methanoyl-5-oxidanyl-pyridin-3-yl)methyl dihydrogen phosphate 2 GT1 [5-hydroxy-4-(methoxymethyl)-6-methylpyridin-3-yl]methyl dihydrogen phosphate 3 MPL N-methyl-pyridoxal-5'-phosphate 4 NOP Pyridoxal-5'-phosphate-N-oxide 5 NPL N-methyl-4-deoxy-4-amino-pyridoxal-5-phosphate 6 P0P [4-(dihydroxymethyl)-5-hydroxy-6-methylpyridin-3-yl]methyl dihydrogen phosphate 7 PLP Pyridoxal-5'-phosphate 8 PLR (5-hydroxy-4,6-dimethylpyridin-3-yl)methyl dihydrogen phosphate 9 PMP 4'-deoxy-4'-aminopyridoxal-5'-phosphate 10 PXP Pyridoxine-5'-phosphate 11 PZP [5-hydroxy-4-(iminomethyl)-6-methyl-pyridin-3-yl]methyl dihydrogen phosphate 12 UAH (5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate 13 X04 (2-amino-4-formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate