1′-Hydroxymidazolam Synonym: 8-Chloro-6-(2-fluorophenyl)-1-hydroxymethyl-4H-imidazo[1,5a][1,4]benzodiazepine Empirical Formula (Hill Notation) C18H13ClFN3O Molecular Weight 341.77 APPEARANCE :WHITE TO OFF-WHITE SOLID H-NMR SPECTRUM :CONSISTENT WITH STRUCTURE PURITY BY HPLC :MINIMUM 97%