The L-(+)-Pantoyl Lactone, with the CAS registry number 5405-40-3, is also known as 2(3H)-Furanone, dihydro-3-hydroxy-4,4-dimethyl-, (R)-. This chemical's molecular formula is C₆H₁₀O₃ and molecular weight is 130.14. What's more, both its IUPAC name and systematic name are the same which is called (3S)-3-Hydroxy-4,4-dimethyloxolan-2-one. It should be kept in a cold and dry place.

Physical properties about L-(+)-Pantoyl Lactone are: (1) ACD/LogP: -0.80; (2) # of Rule of 5 Violations: 0; (3) #H bond acceptors: 3; (4) #H bond donors: 1; (5) #Freely Rotating Bonds: 1; (6) Polar Surface Area: 35.53 Å²; (7) Index of Refraction: 1.468; (8) Molar Refractivity: 31.09 cm³; (9) Molar Volume: 111.6 cm³; (10) Surface Tension: 38.1 dyne/cm; (11) Density: 1.165 g/cm³; (12) Flash Point: 99 °C; (13) Enthalpy of Vaporization: 53.61 kJ/mol; (14) Boiling Point: 224.6 °C at 760 mmHg; (15) Vapour Pressure: 0.0181 mmHg at 25 °C; (16) Melting Point: 90-94 °C.

You can still convert the following datas into molecular structure:
(1) SMILES: O=C1OCC(C)(C)[C@H]1O
(2) InChI: InChI=1/C6H10O3/c1-6(2)3-9-5(8)4(6)7/h4,7H,3H2,1-2H3/t4-/m0/s1
(3) InChIKey: SERHXTVXHNVDKA-BYPYZUCNBU