5,5'-(1,3-Pentadien-1-yl-5-ylidene)dibarbituric acid 63811-39-2 Barbituric acid, 5,5'-(1,3-pentadien-1-yl-5-ylidene)di- NSC76050 Pentamethinedibarbituric acid WLN: T6VMVMV FHJ F1U2U2U- ET6MVMVYVJ