2-(6-Methoxy-1,3-benzodioxol-5-yl)-4,4-dimethyl-4,5-dihydro-1,3-oxazole 6-(4,4-Dimethyl-4,5-dihydro-1,3-oxazol-2-yl)-1,3-benzodioxol-5-yl methyl ether AIDS-138154 AIDS138154 NSC644315