1-Acetyl-2-thiohydantoin 4-Imidazolidinone, 1-acetyl-2-thioxo- 584-26-9 Hydantoin, 1-acetyl-2-thio- NSC1920 Usaf B-7 Usaf be-0405 WLN: T5NYMV EHJ AV1 BUS