This chemical is called 1-(Triisopropylsilyl)-1H-indole-4-boronic acid, pinacol ester, and its systematic name is 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1-[tris(1-methylethyl)silyl]-1H-indole. With the molecular formula of C₂₃H₃₈BNO₂Si, its molecular weight is 399.45. The CAS registry number of this chemical is 690632-17-8.

Other characteristics of the 1-(Triisopropylsilyl)-1H-indole-4-boronic acid, pinacol ester can be summarised as followings: (1)#H bond acceptors: 3; (2)#H bond donors: 0; (3)#Freely Rotating Bonds: 5; (4)Polar Surface Area: 23.39 Å²; (5)Index of Refraction: 1.505; (6)Molar Refractivity: 120.82 cm³; (7)Molar Volume: 407.1 cm³; (8)Polarizability: 47.89×10^-24cm³; (9)Surface Tension: 27.4 dyne/cm; (10)Density: 0.98 g/cm³; (11)Flash Point: 216.1 °C; (12)Enthalpy of Vaporization: 68.97 kJ/mol; (13)Boiling Point: 433.7 °C at 760 mmHg; (14)Vapour Pressure: 1.01E-07 mmHg at 25°C.

You can still convert the following datas into molecular structure: 
1.SMILES: O1B(OC(C)(C)C1(C)C)c3cccc2n(ccc23)[Si](C(C)C)(C(C)C)C(C)C
2.InChI: InChI=1/C23H38BNO2Si/c1-16(2)28(17(3)4,18(5)6)25-15-14-19-20(12-11-13-21(19)25)24-26-22(7,8)23(9,10)27-24/h11-18H,1-10H3
3.InChIKey: NGMKDRPSWHSLIM-UHFFFAOYAJ