(1,4-Bis(3,4,5-trimethoxybenzoyl)-2-piperazinyl)methyl octadecanoate 129229-93-2 N,N'-Di-(3',4',5'-trimethoxybenzoyl)-2-octadecanoyloxymethylpiperazine Octadecanoic acid, (1,4-bis(3,4,5-trimethoxybenzoyl)-2-piperazinyl)methyl ester