only those compounds which enzymatically released the highly reactive alpha , beta-acetylenic aldehyde , propioladehyde , when incubated in vitro with phenobarbital-induced rat liver microsomes , e.g. , tripropargylamine ( 4 ) , pargyline ( 1a ) , and n-propargylbenzylamine ( 1b ) , significantly elevated blood acetaldehyde levels when administered in vivo .
C0001992
aldehyde
C0000966
acetaldehyde