The simple answer - Naphtha
Will not harm the wood. Will remove the goo. Gently peel of that label and then goo remove it with an otherwise clean rag. Keep using a clean spot on the rag till it all comes off - which may take a bit of doing, but not too much. Naphtha is commonly use to de-grunge rosewood fretboards, getting finger crud out the wood and out of the little corners where the frets meet the wood. Its what you want to use.
What you dont want to use:
Forget benzine, toluine, heptane, benzol, picric acid (dry), 1,1,1 diclorotrifloroethane, red fuming nitric acid, dessicated sulphuric acid, scrupulously clean cotton fiber, fulminate of mercury and/or potassium chlorate, lead styphnates, ammonium nitrate, or thermite.
Most of that stuff will getcha in trouble. However you might die (ie, Imo vs Mont Blanc, 1917), or have lots of fun first...
ps... of that list my favorite is the thermite