14c-labelled 2,3-dihydro-8- [ 2-hydroxy-3- [ 4- [ 1-oxo-3- ( 3,4 , 5-trimethoxyphenyl ) -2-propenyl ] -1-piperazinyl ] propoxy ] -1 , 4-benzodioxin-5-carboxylic acid , isopentyl ester ( tpbe ) was administered orally and intravenously to rats and dogs and excretion in urine and faeces studied .
C0007066
carboxylic acid
C0014898
ester