This chemical is called Boronic acid, B-(4-methyl-3-thienyl)-, and its systematic name is (4-methylthiophen-3-yl)boronic acid. With the molecular formula of C₅H₇BO₂S, its product categories are Blocks; Boronic Acids and Derivatives; Heteroaryl. The CAS registry number of this chemical is 177735-11-4.  In addition, this chemical should be sealed in the cool and dry place, away from oxides.

Other characteristics of the Boronic acid, B-(4-methyl-3-thienyl)- can be summarised as followings: (1)ACD/LogP: 1.73; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 1.73; (4)ACD/LogD (pH 7.4): 1.68; (5)ACD/BCF (pH 5.5): 12.08; (6)ACD/BCF (pH 7.4): 10.82; (7)ACD/KOC (pH 5.5): 207.03; (8)ACD/KOC (pH 7.4): 185.43; (9)#H bond acceptors: 2; (10)#H bond donors: 2; (11)#Freely Rotating Bonds: 3; (12)Polar Surface Area: 46.7 Å²; (13)Index of Refraction: 1.55; (14)Molar Refractivity: 36.05 cm³; (15)Molar Volume: 113 cm³; (16)Polarizability: 14.29×10^-24cm³; (17)Surface Tension: 46.2 dyne/cm; (18)Density: 1.25 g/cm³; (19)Flash Point: 136.5 °C; (20)Enthalpy of Vaporization: 57.26 kJ/mol; (21)Boiling Point: 302.1 °C at 760 mmHg; (22)Vapour Pressure: 0.000448 mmHg at 25°C.

You can still convert the following datas into molecular structure: 
1.SMILES: OB(O)c1cscc1C
2.InChI: InChI=1/C5H7BO2S/c1-4-2-9-3-5(4)6(7)8/h2-3,7-8H,1H3
3.InChIKey: LVPFZXKLROORIK-UHFFFAOYAY