IUPAC Name: 5-pentan-2-yl-5-prop-2-enyl-2-sulfanylidene-1,3-diazinane-4,6-dione 
Empirical Formula: C₁₂H₁₈N₂O₂S
Molecular Weight: 254.3485g/mol 
XLogP3: 3.2
H-Bond Donor: 2
H-Bond Acceptor: 2
Rotatable Bond Count: 5
Tautomer Count: 5
Exact Mass: 254.108899
MonoIsotopic Mass: 254.108899
Topological Polar Surface Area: 58.2
Heavy Atom Count: 17
Formal Charge: 0
Complexity: 346 
Index of Refraction: 1.551
Molar Refractivity: 69.96 cm³
Molar Volume: 219.1 cm³
Polarizability: 27.73×10^-24cm³
Surface Tension: 48.3 dyne/cm
Density: 1.16 g/cm³
Canonical SMILES: CCCC(C)C1(C(=O)NC(=S)NC1=O)CC=C
InChI: InChI=1S/C12H18N2O2S/c1-4-6-8(3)12(7-5-2)9(15)13-11(17)14-10(12)16/h5,8H,2,4,6-7H2,1,3H3,(H2,13,14,15,16,17)
InChIKey: XLOMZPUITCYLMJ-UHFFFAOYSA-N
Structure of 5-Allyl-5-(1-methylbutyl)-2-thiobarbituric acid (CAS NO.77-27-0):

Hazard Codes: T
Risk Statements: 23/24/25
 R23/24/25:Toxic by inhalation, in contact with skin and if swallowed.
Safety Statements: 36/37/39-45 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
RIDADR: 3249
WGK Germany: 3
HazardClass: 6.1(b)
PackingGroup: III
Poison by intravenous route. Caution: Abuse may lead to habituation or addiction. When heated to decomposition it emits toxic fumes of SO_x and NO_x.

  5-Allyl-5-(1-methylbutyl)-2-thiobarbituric acid , its cas register number is 77-27-0. It also can be called 5-Allyl-5-(1-methylbutyl)-2-thiobarbitursaeure ; EINECS 201-018-3 ; NSC 120815 ; Thiamylal ; Thioseconal ; UNII-01T23W89FR .
When heated to decomposition it emits toxic fumes of SO_x and NO_x.Wear suitable protective clothing, gloves and eye/face protection when contact with 5-Allyl-5-(1-methylbutyl)-2-thiobarbituric acid (CAS NO.77-27-0). In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)