4,6(1H,5H)-Pyrimidinedione, dihydro-5-[(4-hydroxy-3-iodo-5-methoxyphenyl)methylene]-2-thioxo- 5-(5-Iodovanillylidene)-2-thiobarbituric acid 73681-09-1 Barbituric acid, 5-(5-iodovanillylidene)-2-thio- NSC90733