4,6(1H,5H)-Pyrimidinedione, dihydro-5-(2-pyridinylmethylene)-2-thioxo- 5-(2-Pyridylmethylene)-2-thiobarbituric acid 73664-50-3 Barbituric acid, 5-(2-pyridylmethylent)-2-thio- NSC89387 WLN: T6NJ B1U- CT6MVYVMYJ FUS