the concentrations of acetone , acetophenone , allyl alcohol , n-butanol , carbitol , dioxane , ethanol , formaldehyde , iso-propanol , mercaptoethanol , methanol and propylene glycol required to block spontaneous contractions of rabbit isolated ileum by 50 % ( ec50 ) in vitro were determined .
C0001962
ethanol
C0001963
methanol