1,3,4-Oxadiazol-2(3H)-one, 5-(4-ethoxy-3,5-dimethoxyphenyl)-3-(4-morpholinylmethyl)- 5-(4-Ethoxy-3,5-dimethoxyphenyl)-3-(4-morpholinylmethyl)-1,3,4-oxadiazol-2(3H)-one 73484-61-4