37431-39-3 5-25-03-00337 (Beilstein Handbook Reference) 5-Isobutyryloxy-5-(1-phenylethyl)barbituric acid BRN 0763643 Barbituric acid, 5-isobutyryloxy-5-(1-phenethyl)- Propanoic acid, 2-methyl-, hexahydro-2,4,6-trioxo-5-(1-phenylethyl)-5-pyrimidinyl ester