4-pyridoxic acid2-methyl-3-hydroxy-4-carboxy-5-hydroxymethylpyridine3-hydroxy-5-(hydroxymethyl)-2-methyl-4-pyridinecarboxylic acid3-hydroxy-5-(hydroxymethyl)-2-methylisonicotinic acid4-Pyridoxic acid4-Pyridoxinsaeure4-pyridoxinecarboxylic acid4-pyridoxinic acid4-pyridoxylic acidpyridoxic acid