2(5H)-Pyrimidinethione, 4,6-dihydroxy-s-piperonylidene- 4,6(1H,5H)-Pyrimidinedione, 5-(1,3-benzodioxol-5-ylmethylene)dihydro-2-thioxo- (9CI) 4,6-Dihydroxy-5-piperonylidene-2(5H)-pyrimidinethione 4-27-00-08857 (Beilstein Handbook Reference) 5-Piperonylidene-2-thiobarbituric acid 74051-76-6 BRN 0274353 Barbituric acid, 5-piperonylidene-2-thio- NSC 89379