33837-41-1 5-(2-Hydroxypropyl)-5-(1-methylbutyl)barbituric acid 5-(p-nitrobenzoate) 5-25-03-00288 (Beilstein Handbook Reference) BRN 0725945 Barbituric acid, 5-(2-hydroxypropyl)-5-(1-methylbutyl)-, 5-(p-nitrobenzoate)