Molecule structure of Levetiracetam acid (CAS NO.103833-72-3):

Molecular Formula: C₈H₁₃NO₃
Molecular Weight: 171.19 g/mol
Density: 1.227 g/cm³
Melting Point: 124-126 °C
Boiling Point: 370.975 °C at 760 mmHg 
Flash Point: 178.16 °C
Index of Refraction: 1.517
Molar Refractivity: 42.206 cm³
Molar Volume: 139.519 cm³
Polarizability: 16.732×10^-24 cm³
Surface Tension: 50.798 dyne/cm  
Enthalpy of Vaporization: 67.861 kJ/mol 
InChI: InChI=1/C8H13NO3/c1-2-6(8(11)12)9-5-3-4-7(9)10/h6H,2-5H2,1H3,(H,11,12)/t6-/m0/s1 
InChIKey of Levetiracetam acid (CAS NO.103833-72-3): IODGAONBTQRGGG-LURJTMIEBF

 Levetiracetam acid (CAS NO.103833-72-3) is also named as (2S)-2-(2-Oxo-1-pyrrolidinyl)butanoic acid ; (2S)-2-(2-Oxopyrrolidin-1-yl)butanoic acid ; 1-pyrrolidineacetic acid, alpha-ethyl-2-oxo-, (alphaS)- ; (2s)-2- (2- oxopyrrolidin -1-yl) butanoic acid ; (S)-2-(2-Oxo-pyrrolidin-1-yl)-butyric acid ; (S)-alpha-Ethyl-2-oxo-1-pyrrolidineacetic acid (R)-alpha-methylbenzenemethanamine salt .