Molecular structure of 2-Pyrrolylboronic acid (CAS NO.763120-43-0) is:

Product Name: 2-Pyrrolylboronic acid
CAS Registry Number: 763120-43-0
Molecular Formula: C₄H₆BNO₂
Molecular Weight: 110.91
Index of Refraction: 1.541 
Molar Refractivity: 27.21 cm³ 
Molar Volume: 86.4 cm³
Surface Tension: 52.7 dyne/cm 
Density: 1.28 g/cm³ 
Flash Point: 169.1 °C 
Enthalpy of Vaporization: 63.44 kJ/mol 
Boiling Point: 356 °C at 760 mmHg 
Vapour Pressure: 1.1E-05 mmHg at 25 °C 
Product Categories: Boronic acids
SMILES: OB(O)c1cccn1 
InChI: InChI=1/C4H6BNO2/c7-5(8)4-2-1-3-6-4/h1-3,6-8H
InChIKey: WADSQZHEAXPENM-UHFFFAOYAF 
Std. InChI: InChI=1S/C4H6BNO2/c7-5(8)4-2-1-3-6-4/h1-3,6-8H
Std. InChIKey: WADSQZHEAXPENM-UHFFFAOYSA-N

Safty information about 2-Pyrrolylboronic acid (CAS NO.763120-43-0) is:
Risk Statements: 36/37/38 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36/37/39 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection.

 2-Pyrrolylboronic acid , its cas register number is 763120-43-0. It also can be called Boronic acid,B-1H-pyrrol-2-yl- ; Boronicacid, 1H-pyrrol-2-yl- (9CI) ; (Pyrrol-2-yl)boronic acid ; 1H-Pyrrol-2-ylboronicacid .