The 4,4,5,5-Tetramethyl-2-[4-(trimethylsilyl)phenyl]-1,3,2-dioxaborolane, with the CAS registry number 1186026-67-4, is also known as 4-Trimethylsilylbenzeneboronic acid pinacol ester. This chemical's molecular formula is C₁₅H₂₅BO₂Si and molecular weight is 276.17. What's more, its systematic name is called Trimethyl[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]silane. 

Physical properties about 4,4,5,5-Tetramethyl-2-[4-(trimethylsilyl)phenyl]-1,3,2-dioxaborolane are: (1)#H bond acceptors: 2; (2)#H bond donors: 0; (3)#Freely Rotating Bonds: 2; (4)Polar Surface Area: 18.46 Å²; (5)Index of Refraction: 1.479; (6)Molar Refractivity: 82.09 cm³; (7)Molar Volume: 289.3 cm³; (8)Surface Tension: 27.1 dyne/cm; (9)Density: 0.95 g/cm³; (10)Flash Point: 156.7 °C; (11)Enthalpy of Vaporization: 55.56 kJ/mol; (12)Boiling Point: 335.4 °C at 760 mmHg; (13)Vapour Pressure: 0.000233 mmHg at 25 °C.

You can still convert the following datas into molecular structure:
(1) SMILES: CC1(C)OB(OC1(C)C)c2ccc(cc2)[Si](C)(C)C
(2) InChI: InChI=1S/C15H25BO2Si/c1-14(2)15(3,4)18-16(17-14)12-8-10-13(11-9-12)19(5,6)7/h8-11H,1-7H3
(3) InChIKey: OPGOPAKVZDQUMR-UHFFFAOYSA-N