4,6-Dibromo-3a,7a-dihydro-2H-thieno[3',4':4,5]cyclopenta[1,2-d][1,3]oxazole-2,7(3H)-dione AIDS-145690 AIDS145690 NSC671009 {2H-Thieno[3',4':4,5]cyclopent[1,2-d]oxazole-} 2,7(7aH)-dione,4, 6-dibromo-3,3a-dihydro-