R-239

Recton

Sigmodal

5-(β-Bromoallyl)-5-(1-methylbutyl)barbituric acid

5-(2-bromoallyl)-5-(1-methylbutyl)-1H,3H,5H-pyrimidine-2,4,6-trione

5-(2-Bromo-2-propenyl)-5-(1-methylbutyl)-2,4,6(1H,3H,5H)-pyrimidinetrione