The FMOC-L-Leucine, with the CAS registry number 35661-60-0 and EINECS registry number 252-662-7, has the systematic name of N-[(9H-fluoren-9-ylmethoxy)carbonyl]-L-leucine. It is a kind of white to light yellow crystal powder, and the molecular formula of the chemical is C₂₁H₂₃NO₄. What's more, while dealing with this chemical, you should avoid contacting with skin and eyes.

The characteristics of FMOC-L-Leucine are as followings: (1)ACD/LogP: 4.95; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 2.98; (4)ACD/LogD (pH 7.4): 1.45; (5)ACD/BCF (pH 5.5): 36.49; (6)ACD/BCF (pH 7.4): 1.07; (7)ACD/KOC (pH 5.5): 125.68; (8)ACD/KOC (pH 7.4): 3.67; (9)#H bond acceptors: 5; (10)#H bond donors: 2; (11)#Freely Rotating Bonds: 7; (12)Polar Surface Area: 55.84 Å²; (13)Index of Refraction: 1.582; (14)Molar Refractivity: 97.77 cm³; (15)Molar Volume: 292.6 cm³; (16)Polarizability: 38.75×10^-24cm³; (17)Surface Tension: 50.1 dyne/cm; (18)Density: 1.207 g/cm³; (19)Flash Point: 292.4 °C; (20)Enthalpy of Vaporization: 88.62 kJ/mol; (21)Boiling Point: 559.8 °C at 760 mmHg; (22)Vapour Pressure: 2.28E-13 mmHg at 25°C. 

Addtionally, the following datas could be converted into the molecular structure:
(1)SMILES: O=C(O)[C@@H](NC(=O)OCC3c1ccccc1c2c3cccc2)CC(C)C
(2)InChI: InChI=1/C21H23NO4/c1-13(2)11-19(20(23)24)22-21(25)26-12-18-16-9-5-3-7-14(16)15-8-4-6-10-17(15)18/h3-10,13,18-19H,11-12H2,1-2H3,(H,22,25)(H,23,24)/t19-/m0/s1
(3)InChIKey: CBPJQFCAFFNICX-IBGZPJMEBI