AIDS-127984 AIDS127984 N,8a-Dimethyl-6H,8H,8aH-4.lambda.~5~-[1,3,4]thiadiazolo[2,3-c][1,4]thiazin-2-amine N-(8a-Methyl-6H,8H,8aH-4.lambda.~5~-[1,3,4]thiadiazolo[2,3-c][1,4]thiazin-2-yl)-N-methylamine NSC207898