Chemistry informtion about Nicotine Monosalicylate (CAS NO.29790-52-1) is:
IUPAC Name: 2-Hydroxybenzoic Acid ; 3-[1-(Trideuteriomethyl)Pyrrolidin-2-Yl]Pyridine
Synonyms: Nicotinemonosalicylate(Form1) ; Eudermol ; Nicotine Salicylate ; Nicotinemonosalicylate
Product Categories: Nicotine Derivatives
MF: C₁₇H₂₀N₂O₃
MW: 300.35
EINECS: 249-852-7
Melting Point: 112-1150°C
Flash Point: 243.2 °C
Boiling Point: 478.6 °C at 760 mmHg
Vapour Pressure: 5.72E-10 mmHg at 25°C
Enthalpy of Vaporization: 78.24 kJ/mol 
Following is the molecular structure:

 Nicotine Monosalicylate (CAS NO.29790-52-1) is used for treatment of smoking withdrawal syndrome.

A poison. Symptoms of exposure: extreme nausea, vomiting, evacuation of bowel and bladder, mental confusion, twitching, convulsions. Base is readily absorbed through mucous membranes and intact skin. Institute treatment immediately. When heated to decomposition it emits toxic fumes of NO_x and CO. See also NICOTINE.
RIDADR: 1657
HazardClass: 6.1(a)
PackingGroup: II

DOT Classification:  6.1; Label: Poison

 Nicotine Monosalicylate (CAS NO.29790-52-1) is a white crystalline solid. It is combustible. And, it is toxic by inhalation (dust, etc.) and may be toxic by skin absorption. It can produces toxic oxides of nitrogen during combustion.It is soluble in water.It produced from tobacco. Colorless, oily liquid, combustible, highly toxic. When heated to decomposition, it emits very toxic fumes of carbon monoxide and oxides of nitrogen [Lewis, 3rd ed., 1993, p. 919]. You need to avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.It is non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Containers may explode when heated. Runoff may pollute waterways.