(1-Hydroxy-2-imidazol-1-ylethylidene)diphosphonic acid, monohydrate 165800-06-6 Phosphonic acid, (1-hydroxy-2-(1H-imidazol-1-yl)ethylidene)bis-, monohydrate Zoledronic acid Zoledronic acid hydrate Zoledronic acid monohydrate