153692-15-0 2-(N-Methyl-3-pyridinyl)-1-hydroxyethylidene bisphosphonic acid 3-(3-Hydroxy-3,3-diphosphonopropyl)-1-methylpyridinium hydroxide NE 10244 NE-10244 Pyridinium, 3-(3-hydroxy-3,3-diphosphonopropyl)-1-methyl-, hydroxide