Molecular Structure of Ethyl caffeate (CAS NO.102-37-4):

IUPAC Name: ethyl (E)-3-(3,4-dihydroxyphenyl)prop-2-enoate 
Empirical Formula: C₁₁H₁₂O₄
Molecular Weight: 208.2106
H bond acceptors: 4
H bond donors: 2
Freely Rotating Bonds: 6
Polar Surface Area: 44.76Ų
Index of Refraction: 1.612
Molar Refractivity: 56.94 cm³
Molar Volume: 163.7 cm³
Surface Tension: 54.3 dyne/cm
Density: 1.271 g/cm³
Flash Point: 148.4 °C
Enthalpy of Vaporization: 64.92 kJ/mol
Boiling Point: 377 °C at 760 mmHg
Vapour Pressure: 3.22E-06 mmHg at 25°C
InChI
InChI=1/C11H12O4/c1-2-15-11(14)6-4-8-3-5-9(12)10(13)7-8/h3-7,12-13H,2H2,1H3/b6-4+
Smiles
CCOC(=O)\C=C\c1cc(O)c(O)cc1

 Ethyl caffeate , with CAS number of 102-37-4, can be called Caffeic acid ethyl ester ; Ethyl 3,4-dihydroxycinnamate ; Ethyl caffeoate ; Cinnamicacid, 3,4-dihydroxy-, ethyl ester (6CI,7CI,8CI) ; 2-propenoic acid, 3-(3,4-dihydroxyphenyl)-, ethyl ester, (2E)- ; 2-Propenoic acid, 3-(3,4-dihydroxyphenyl)-, ethyl ester .