Molecular Structure of Methyl 4-Boc-piperazine-2-carboxylate (CAS NO.129799-08-2):

IUPAC Name:1-O-tert-butyl 3-O-methyl piperazine-1,3-dicarboxylate 
Empirical Formula: C₁₁H₂₀N₂O₄
Molecular Weight: 244.2875
H bond acceptors: 6
H bond donors: 1
Freely Rotating Bonds: 4
Polar Surface Area: 59.08Ų
Molar Refractivity: 61.12 cm³
Molar Volume: 218.3 cm³
Index of Refraction: 1.471
Surface Tension: 37.6 dyne/cm
Density: 1.118 g/cm³
Flash Point: 148.1 °C
Enthalpy of Vaporization: 56.3 kJ/mol
Boiling Point: 321.3 °C at 760 mmHg
Vapour Pressure: 0.000301 mmHg at 25°C
Product Categories: pharmacetical;Piperaizine

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.

 Methyl 4-Boc-piperazine-2-carboxylate , its cas register number is 129799-08-2. It also can be called 1-tert-butyl-3-methyl-piperazine-1,3-dicarboxylate ; 4n-boc-piperazine-2-carboxylic acid methyl ester ; n-4-boc-2-piperazinecarboxylic acid methyl ester ; piperazine-1,3-dicarboxylic acid 1-tert-butyl ester 3-methyl ester ; n-t-butoxycarbonyl-piperazine-2-carboxylic acid methyl ester ; 1-n-boc-piperazine-3-carboxylic acid methyl ester and so on.