Molecule structure of Monocrotalic acid (CAS NO.26543-09-9) :

IUPAC Name: (2R,3R,4S)-3-hydroxy-2,3,4-trimethyl-5-oxooxolane-2-carboxylic acid 
Molecular Weight: 188.17788 g/mol
Molecular Formula: C₈H₁₂O₅ 
Density: 1.322 g/cm³ 
Boiling Point: 401.7 °C at 760 mmHg 
Flash Point: 166.7 °C
Index of Refraction: 1.499
Molar Refractivity: 41.81 cm³
Molar Volume: 142.3 cm³
Polarizability: 16.57 10^-24 cm³
Surface Tension: 48.7 dyne/cm 
Enthalpy of Vaporization: 75.45 kJ/mol
Vapour Pressure: 4E-08 mmHg at 25 °C 
XLogP3-AA: 0.3
H-Bond Donor: 2
H-Bond Acceptor: 5
Rotatable Bond Count: 1
Tautomer Count: 2
Exact Mass: 188.068473
MonoIsotopic Mass: 188.068473
Topological Polar Surface Area: 83.8
Heavy Atom Count: 13
Complexity: 274
Defined Atom StereoCenter Count: 3
Canonical SMILES: CC1C(=O)OC(C1(C)O)(C)C(=O)O
Isomeric SMILES: C[C@@H]1C(=O)O[C@@]([C@]1(C)O)(C)C(=O)O
InChI: InChI=1S/C8H12O5/c1-4-5(9)13-8(3,6(10)11)7(4,2)12/h4,12H,1-3H3,(H,10,11)/t4-,7-,8+/m1/s1
InChIKey of Monocrotalic acid (CAS NO.26543-09-9) : YTEPYGBARSCSMX-VXFFBNABSA-N

Moderately toxic by intravenous route. When heated to decomposition it emits acrid smoke and irritating vapors.

Monocrotalic acid (CAS NO.26543-09-9) 2-Furancarboxylic acid, tetrahydro-3-hydroxy-2,3,4-trimethyl-5-oxo-, (2R-(2-alpha,3-beta,4-alpha))- ; 2-Furoic acid, tetrahydro-3-hydroxy-2,3,4-trimethyl-5-oxo-, (2R,3R,4R)- (8CI) ; L-Arabinaric acid, 2-deoxy-2-methyl-3,4-di-C-methyl-, 1,4-lactone (9CI) .