the following five metabolites could be identified : ( 1 ) desbutyl-bupivacaine , ( 2 ) 3'-hydroxy-bupivacaine , ( 3 ) n-butylpipecolyl-2-amide , ( 4 , 5 ) mono-hydroxylated isomeres on the piperidine ring .
C0006400
bupivacaine
C0002482
amide