EMULSIN A LE VIOLETTE.
"The Art of Perfumery" by G. W. Septimus Piesse
When hydrolyzed by mineral acids or emulsin, it yields glucose and hydroquinone.
"The Chemistry of Plant Life" by Roscoe Wilfred Thatcher
The enzymes ptyalin and emulsin convert it into glucose and saligenin, ortho-oxybenzylalcohol, HO.C6H4.CH2OH.
"Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2" by Various