№

A group of organic compounds

Amount of wt%

1

Aliphatic hydrocarbons

36.08

2

Aromatic hydrocarbons

· Derivatives of benzene

· Derivatives of naphthalene

· Anthracene and Phenanthrene

10.23

20.51

8.01

3

Phenolic compounds

13.96

4

Nitrogen-containing compounds

1.66

5

Others

9.55