Brivaracetam impurity 154

Brivaracetam impurity 92

Brivaracetam impurity 91

Brivaracetam impurity 55

Brivaracetam impurity 87

Brivaracetam impurity 57

Brivaracetam impurity 35

Brivaracetam impurity K

Brivaracetam impurity 34

Brivaracetam impurity E

Brivaracetam impurity 116

Brivaracetam impurity 118 HCl

(7R,14R)-1-(difluoromethoxy)-11-((S)-5',6'-dihydrospiro[azetidine-2,7'-cyclopenta[b]pyridin]-3'-yl)-6-methyl-6,7-dihydro-7,14-methanobenzo[f]benzo[4,5]imidazo[1,2-a][1,4]diazocin-5(14H)-one

(7R,14R)-1-(difluoromethoxy)-11-(5,6-dihydrospiro[cyclopenta[b]pyridine-7,2'-pyrrolidin]-3-yl)-6-methyl-6,7-dihydro-7,14-methanobenzo[f]benzo[4,5]imidazo[1,2-a][1,4]diazocin-5(14H)-one

(7R,14R)-1-(difluoromethoxy)-11-[4-(dimethylphosphinyl)-2,3-difluorophenyl]-6,7-dihydro-7,14-Methanobenzimidazo[1,2-b][2,5]benzodiazocin-5(14H)--one

(7R,14R)-1-(difluoromethoxy)-11-(4-hydroxy-3,4-dihydro-2H-pyrano[3,2-b]pyridin-7-yl)-6-methyl-6,7-dihydro-7,14-methanobenzo[f]benzo[4,5]imidazo[1,2-a][1,4]diazocin-5(14H)-one

(7R,14R)-1-(difluoromethoxy)-11-[4-(dimethylphosphinyl)-2-fluorophenyl]-10-fluoro-6,7-dihydro-6-methyl-7,14-Methanobenzimidazo[1,2-b][2,5]benzodiazocin-5(14H)--one

(7R,14R)-1-(difluoromethoxy)-11-((S)-3-(fluoromethyl)-3-hydroxy-2,3-dihydrofuro[3,2-b]pyridin-6-yl)-6-methyl-6,7-dihydro-7,14-methanobenzo[f]benzo[4,5]imidazo[1,2-a][1,4]diazocin-5(14H)-one

(7R,14R)-1-(difluoromethoxy)-11-((2S,4S)-4-hydroxy-2-methyl-3,4-dihydro-2H-pyrano[3,2-b]pyridin-7-yl)-6-methyl-6,7-dihydro-7,14-methanobenzo[f]benzo[4,5]imidazo[1,2-a][1,4]diazocin-5(14H)-one

(7R,14R)-1-(difluoromethoxy)-11-[2-[1-[[(tert-butyl)dimethylsilyl]oxy]-1-methylethyl]pyrimidin-5-yl]-10-fluoro-6,7-dihydro-7,14-Methanobenzimidazo[1,2-b][2,5]benzodiazocin-5(14H)--one