male f-344 rats , weighing 190 to 210 g , were pretreated with 15 ppm hcho , 6 hr/day for 9 days , and challenged on the 10th day with a saturated ( acetaldehyde , propionaldehyde , and butyraldehyde ) , unsaturated ( acrolein and crotonaldehyde ) , or cyclic ( cyclohexanecarboxaldehyde , 3-cyclohexene-1-carboxaldehyde , and benzaldehyde ) aldehyde .
C0001204
acrolein
C0001992
aldehyde