Structure

Chemical shift range (ppm)

No. of Moieties/Aromatic Ring

MWL

ILL

EOL

Methoxy content

57 - 54

0.83

0.74

0.73

Aromatic methine carbons

125 - 103

2.42

2.58

2.08

Aromatic C-C structures

141 - 125

1.78

1.94

2.22

Oxygenated aromatic carbons

160 - 141

1.86

1.67

1.78

Phenolic OH, conjugated COOR

168.6 - 166

0.31

0.38

0.59

Secondary aliphatic OH

169.6 - 168.6

0.61

0.67

0.24

Primary aliphatic OH

172 - 169.6

0.36

0.67

0.27

Degree of condensation^a

125 - 103

0.58

0.42

0.92