Following is the structure of Fmoc-Glu(OtBu)-OH (CAS NO.71989-18-9):
                    
Empirical Formula: C₂₄H₂₇NO₆
Molecular Weight: 425.4743
EINECS: 276-253-8
Index of Refraction: 1.57
Molar Refractivity: 113.45 cm³
Molar Volume: 345.2 cm³
Density: 1.232 g/cm³
Flash Point: 339.7 °C
Surface Tension: 50.5 dyne/cm
Enthalpy of Vaporization: 99.05 kJ/mol
Boiling Point: 638.1 °C at 760 mmHg
Vapour Pressure: 3.72E-17 mmHg at 25 °C
Product Categories of Fmoc-Glu(OtBu)-OH (CAS NO.71989-18-9): Amino Acid Derivatives; Amino Acids; Glutamic acid [Glu, E]; Fmoc-Amino Acids and Derivatives; Amino Acids (N-Protected); Biochemistry; Fmoc-Amino Acids; Fmoc-Amino acid series
Appearance of Fmoc-Glu(OtBu)-OH (CAS NO.71989-18-9): White to Off White Powder
Solubility of Fmoc-Glu(OtBu)-OH (CAS NO.71989-18-9): Insoluble in WATER; soluble in most organic solvents
SMILES: O=C(OC(C)(C)C)[C@@H](NC(=O)OCC3c1ccccc1c2c3cccc2)CCC(=O)O
InChI: InChI=1/C24H27NO6/c1-24(2,3)31-22(28)20(12-13-21(26)27)25-23(29)30-14-19-17-10-6-4-8-15(17)16-9-5-7-11-18(16)19/h4-11,19-20H,12-14H2,1-3H3,(H,25,29)(H,26,27)/t20-/m0/s1
InChIKey: GOPWHXPXSPIIQZ-FQEVSTJZBO

RTECS Number: No RTECS number has been assigned to Fmoc-Glu(OtBu)-OH.

Hazard Codes: Xi
Risk Statements: 36/37/38 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-27-36/37/39
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S27:Take off immediately all contaminated clothing. 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection.
WGK Germany: 3

 Fmoc-Glu(OtBu)-OH , its cas register number 71989-18-9. It also can be called Fmoc-L-glutamic acid 5-tert-butyl ester ; 5-tert-Butyl N-[(9H-fluoren-9-ylmethoxy)carbonyl]-2-aminoglutarate ; and Fmoc-Glu(OtBu)-OH .