The Molecular Structure of 4-Boc-1-Fmoc-2-piperazinecarboxylic acid (CAS NO.183742-23-6):

Empirical Formula: C₂₅H₂₈N₂O₆
Molecular Weight: 452.4996 
IUPAC Name: 1-(9H-fluoren-9-ylmethoxycarbonyl)-4-[(2-methylpropan-2-yl)oxycarbonyl]piperazine-2-carboxylic acid
Product Categories: pharmacetical
Nominal Mass: 452 Da
Average Mass: 452.4996 Da
Monoisotopic Mass: 452.194737 Da 
Index of Refraction: 1.597
Molar Refractivity: 119.26 cm³
Molar Volume: 349.9 cm³
Surface Tension: 55.1 dyne/cm
Density: 1.292 g/cm³
Flash Point: 331.4 °C
Enthalpy of Vaporization: 97.19 kJ/mol
Boiling Point: 624.4 °C at 760 mmHg
Vapour Pressure: 1.88E-16 mmHg at 25°C

Hazard Codes: XiXn
Risk Statements: 20/21/22-36/37/38 
R20/21/22: Harmful by inhalation, in contact with skin and if swallowed
R36/37/38: Irritating to eyes, respiratory system and skin
Safety Statements: 22-26-36/37/39 
S22: Do not breathe dust
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
Hazard Note: Irritant

 4-Boc-1-Fmoc-2-piperazinecarboxylic acid (CAS NO.183742-23-6) is also called as1-Fmoc-4-boc-piperazine-2-carboxylic acid ; 1-N-fmoc-4-n-boc-piperazine-2-carboxylic acid ; 2-Piperazinecarboxylic acid, n1-fmoc protected, n4-boc protected ; 4-(Tert-butoxycarbonyl)-1-[(9h-fluoren-9-ylmethoxy)carbonyl]-2-piperazinecarboxylic acid ; N-4-boc-n-1-fmoc-2-piperazine carboxylic acid ; Piperazine-1,2,4-tricarboxylic acid 4-tert-butyl ester 1-(9h-fluoren-9-ylmethyl) ester ; 4-(Tert-butoxycarbonyl)-1-[(9h-fluoren-9-ylmethoxy)carbonyl]- 2-piperazinecarboxylic ; 2-Piperazinecarboxylic acid, n1-fmoc protected, n4-boc protected 97% .