1,3,4-Oxadiazol-2(3H)-one, 3-(1-pyrrolidinylmethyl)-5-(3,4,5-trimethoxyphenyl)- 3-(1-Pyrrolidinylmethyl)-5-(3,4,5-trimethoxyphenyl)-1,3,4-oxadiazol-2(3H)-one 73497-72-0