2-(Hydroxymethyl)-5-methyl-3-(2.lambda.~5~-1,2-triazadienyl)-2,3,3a,9a-tetrahydro-6H-furo[2',3':4,5][1,3]oxazolo[3,2-c]pyrimidine-6,8(7H)-dione AIDS-141064 AIDS141064 NSC655362