IUPAC name: Benzyl 2-amino-3-(4-hydroxyphenyl)propanoate ; 4-methylbenzenesulfonic acid 
Following is the structure of L-Tyrosine benzyl ester p-toluenesulfonate (CAS NO.53587-11-4):
              
Molecular Formula: C₁₆H₁₇NO₃^.C₇H₈O₃S
Molecular Weight: 443.51 g/mol
EINECS: 258-650-8 
Flash Point: 359.8 °C
Melting point: 177 °C
Storage temp.: −20 °C
Refractive index: -13 ° (C=3, MeOH)
Enthalpy of Vaporization: 103.61 kJ/mol
Boiling Point: 671.3 °C at 760 mmHg
Vapour Pressure: 6.16E-19 mmHg at 25 °C
Appearance of L-Tyrosine benzyl ester p-toluenesulfonate (CAS NO.53587-11-4): White to off-white crystalline
Product Categories of L-Tyrosine benzyl ester p-toluenesulfonate (CAS NO.53587-11-4): Amino Acid Derivatives; Amino Acids; Tyrosine [Tyr, Y]; Amino Acids and Derivatives; Amino Acid Benzyl Esters; Amino Acids (C-Protected); Biochemistry; Amino Acid Derivatives; Peptide Synthesis; Tyrosine;Amino Acids; I - Z; Modified Amino Acids
Canonical SMILES: CC1=CC=C(C=C1)S(=O)(=O)O.C1=CC=C(C=C1)COC(=O)C(CC2=CC=C(C=C2)O)N
InChI: InChI=1S/C16H17NO3.C7H8O3S/c17-15(10-12-6-8-14(18)9-7-12)16(19)20-11-13-4-2-1-3-5-13;1-6-2-4-7(5-3-6)11(8,9)10/h1-9,15,18H,10-11,17H2;2-5H,1H3,(H,8,9,10)
InChIKey: PJGVHBLZZQDFFM-UHFFFAOYSA-N

WGK Germany: 3
F: 10

 L-Tyrosine benzyl ester p-toluenesulfonate, its cas register number is 53587-11-4. It also can be called O-benzyl-L-tyrosine toluene-p-sulphonate .