| abstract |
A physical form of (R)-7-acetyl-5-(4-aminophenyl)-8,9-dihydro-8-methyl-7H-1,3-dioxoloÄ4,5 -hÜÄ2,3Übenzodiazepine of formula I having an X-ray powder diffraction pattern with d spacings at 10.61, 8.83, 6.78, 5.83, 4.13 and 3.74 ANGSTROM . The compound is useful as an AMPA antagonist. <CHEM> R is methyl, X is acetyl and Aryl is p-nitrophenyl.i |