129230-01-9 Carbamic acid, (1,1-dimethylethyl)-, (1,4-bis(3,4,5-trimethoxybenzoyl)-2-piperazinyl)methyl ester N,N'-Di-(3',4',5'-trimethoxybenzoyl)-2-N''-tert-butylcarbamoyloxymethylpiperazine