(1-Hydroxy-2-imidazol-1-ylethylidene)diphosphonic acid 118072-93-8 CGP 42446 Phosphonic acid, (1-hydroxy-2-(1H-imidazol-1-yl)ethylidene)bis- Zoledronate Zoledronic acid Zoledronic acid [USAN:INN] Zometa