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(3S)-3-[(4-methoxyphenyl)methyl]piperazin-2-one
(3R)-3-[(4-methoxyphenyl)methyl]piperazin-2-one
3-{[2-(trifluoromethoxy)phenyl]methyl}piperazin-2-one
(3S)-3-{[2-(trifluoromethoxy)phenyl]methyl}piperazin-2-one
(3R)-3-{[2-(trifluoromethoxy)phenyl]methyl}piperazin-2-one
3-{[3-(trifluoromethoxy)phenyl]methyl}piperazin-2-one
(3S)-3-{[3-(trifluoromethoxy)phenyl]methyl}piperazin-2-one
(3R)-3-{[3-(trifluoromethoxy)phenyl]methyl}piperazin-2-one
3-{[4-(trifluoromethoxy)phenyl]methyl}piperazin-2-one
(3S)-3-{[4-(trifluoromethoxy)phenyl]methyl}piperazin-2-one
(3R)-3-{[4-(trifluoromethoxy)phenyl]methyl}piperazin-2-one
3-[(4-ethylphenyl)methyl]piperazin-2-one
(3S)-3-[(4-ethylphenyl)methyl]piperazin-2-one
(3R)-3-[(4-ethylphenyl)methyl]piperazin-2-one
3-{[4-(propan-2-yl)phenyl]methyl}piperazin-2-one
(3S)-3-{[4-(propan-2-yl)phenyl]methyl}piperazin-2-one
(3R)-3-{[4-(propan-2-yl)phenyl]methyl}piperazin-2-one
3-[(4-tert-butylphenyl)methyl]piperazin-2-one
(3S)-3-[(4-tert-butylphenyl)methyl]piperazin-2-one
(3R)-3-[(4-tert-butylphenyl)methyl]piperazin-2-one
3-[(2-nitrophenyl)methyl]piperazin-2-one
(3S)-3-[(2-nitrophenyl)methyl]piperazin-2-one
(3R)-3-[(2-nitrophenyl)methyl]piperazin-2-one
3-[(3-nitrophenyl)methyl]piperazin-2-one
(3S)-3-[(3-nitrophenyl)methyl]piperazin-2-one
(3R)-3-[(3-nitrophenyl)methyl]piperazin-2-one
3-[(4-nitrophenyl)methyl]piperazin-2-one
(3S)-3-[(4-nitrophenyl)methyl]piperazin-2-one
(3R)-3-[(4-nitrophenyl)methyl]piperazin-2-one
3-[(2,3-difluorophenyl)methyl]piperazin-2-one
(3S)-3-[(2,3-difluorophenyl)methyl]piperazin-2-one
(3R)-3-[(2,3-difluorophenyl)methyl]piperazin-2-one
3-[(2,4-difluorophenyl)methyl]piperazin-2-one
(3S)-3-[(2,4-difluorophenyl)methyl]piperazin-2-one
(3R)-3-[(2,4-difluorophenyl)methyl]piperazin-2-one
3-[(2,5-difluorophenyl)methyl]piperazin-2-one
(3S)-3-[(2,5-difluorophenyl)methyl]piperazin-2-one
(3R)-3-[(2,5-difluorophenyl)methyl]piperazin-2-one
3-[(2,6-difluorophenyl)methyl]piperazin-2-one
(3R)-3-[(2,6-difluorophenyl)methyl]piperazin-2-one
3-[(3,4-difluorophenyl)methyl]piperazin-2-one
(3S)-3-[(3,4-difluorophenyl)methyl]piperazin-2-one
(3R)-3-[(3,4-difluorophenyl)methyl]piperazin-2-one
3-[(3,5-difluorophenyl)methyl]piperazin-2-one
(3S)-3-[(3,5-difluorophenyl)methyl]piperazin-2-one
(3R)-3-[(3,5-difluorophenyl)methyl]piperazin-2-one
3-[(2,3-dichlorophenyl)methyl]piperazin-2-one
(3S)-3-[(2,3-dichlorophenyl)methyl]piperazin-2-one
(3R)-3-[(2,3-dichlorophenyl)methyl]piperazin-2-one
3-[(2,4-dichlorophenyl)methyl]piperazin-2-one