1-(4-fluorobenzyl)-3-(4-isobutoxybenzyl)-1-(1-methylpiperidin-4-yl)urea-D4;N-(4-Fluorobenzyl)-N-(1-methylpiperidin-4-yl)-N'-[[4-(2-methylpropyloxy)phenyl]methyl]carbamide-d4; N-[(4-Fluorophenyl)methyl]-N-(1-methyl-4-piperidinyl)-N'-[[4-(2-methylpropoxy)phenyl]methyl]urea-d4;
