(1,4-Bis(3,4,5-trimethoxybenzoyl)-2-piperazinyl)methyl 2,2-dimethylpropanoate 129229-90-9 N,N'-Bis(3,4,5-trimethoxylbenzoyl)-2-piperizinylmethyl 2,2-dimethylpropanoate N,N'-Di-(3',4',5'-trimethoxybenzoyl)-2-tert-butylcarbonyloxymethylpiperazine Propanoic acid, 2,2-dimethyl-, (1,4-bis(3,4,5-trimethoxybenzoyl)-2-piperazinyl)methyl ester