3.2.1.B31 ethanol completely inactivated by ethanol–H2O of above 1:2 (v/v) 69 3.2.1.B31 methanol methanol-H2O at 1:2 (v/v) leads to a loss of activity of about only 20%. The enzyme is completely inactivated by methanol-H2O at above 1:1 (v/v) 83 3.2.1.B31 quercitrin weak 1936 3.2.1.B31 troxerutin weak 172279