1,3,4-Oxadiazol-2(3H)-one, 3-(2,3-dihydro-2,2-dimethyl-7-benzofuranyl)-5-methoxy- 3-(2,3-Dihydro-2,2-dimethylbenzofuran-7-yl)-5-methoxy-1,3,4-oxadiazol-2(3H)-one 82277-78-9 DBOX