The L-Aspartic acid,N-[(9H-fluoren-9-ylmethoxy)carbonyl]-, 1-methyl ester, with the CAS registry number 145038-52-4, is also known as Fmoc-L-aspartic acid alpha methyl ester. It belongs to the product categories of Fmoc-Amino Acids and Derivatives; Fmoc-Amino acid series. This chemical's molecular formula is C₂₀H₁₉NO₆ and molecular weight is 369.37. What's more, its systematic name is (3S)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-methoxy-4-oxo-butanoic acid. 

Physical properties of L-Aspartic acid,N-[(9H-fluoren-9-ylmethoxy)carbonyl]-, 1-methyl ester are: (1)ACD/LogP: 3.93; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 2.35; (4)ACD/LogD (pH 7.4): 0.64; (5)#H bond acceptors: 7; (6)#H bond donors: 2; (7)#Freely Rotating Bonds: 8; (8)Polar Surface Area: 101.93 Å²; (9)Index of Refraction: 1.595; (10)Molar Refractivity: 94.95 cm³; (11)Molar Volume: 279.2 cm³; (12)Polarizability: 37.64×10^-24cm³; (13)Surface Tension: 56.7 dyne/cm; (14)Density: 1.322 g/cm³; (15)Flash Point: 322.5 °C; (16)Enthalpy of Vaporization: 95.22 kJ/mol; (17)Boiling Point: 609.7 °C at 760 mmHg; (18)Vapour Pressure: 1.02E-15 mmHg at 25°C.

You can still convert the following datas into molecular structure:
(1)SMILES: OC(=O)C[C@H](NC(=O)OCC3c1ccccc1c2ccccc23)C(=O)OC
(2)InChI: InChI=1S/C20H19NO6/c1-26-19(24)17(10-18(22)23)21-20(25)27-11-16-14-8-4-2-6-12(14)13-7-3-5-9-15(13)16/h2-9,16-17H,10-11H2,1H3,(H,21,25)(H,22,23)/t17-/m0/s1
(3)InChIKey: UEUZUMRMWJUEMK-KRWDZBQOSA-N