N-[[4-[[(4-Amino[1,1'-biphenyl]-3-yl)amino]carbonyl]phenyl]methyl]carbamic Acid Methyl Ester-d3 is the labelled analog of a biaryl benzamides that exhibit inhibitory selectivity over class II Histone Deacetylase (HDACs) and as well as class I HDACs. N-[[4-[[(4-Amino[1,1'-biphenyl]-3-yl)amino]carbonyl]phenyl]methyl]carbamic Acid Methyl Ester was deteremined to be a potent and selective inhibitor of HDAC with reduced off-target activity and tumor growth inhibition activity. Melting Point: 172-174°CSolubility:DMSO, Methanol