1,3,4-Oxadiazol-2(3H)-one, 3-((phenylamino)methyl)-5-(3,4,5-trimethoxyphenyl)- 3-((Phenylamino)methyl)-5-(3,4,5-trimethoxyphenyl)-1,3,4-oxadiazol-2(3H)-one 73484-40-9