1
H3C
C
CH
CH3
CH3
2
H3C
C
CH
CH3
3
H3C
CH
H3C
C
CH
H2C
C
H3C
CH
C
CH2
Br
CH
CH2
CH2
CH3
CH
CH2
CH2
CH3
CH2
C
C
CH2
Cl
C
HC
CH
HC
H2C
C2H5
CH2
CH
C
Cl
CH
CH3
CH3
CH
C
CH3
Cl
C
CH3
CH3
CH3
9
CH3
CH3
CH3
CH3
8
H3C
CH3
CH3
CH3
7
CH
CH2
CH3
CH3
H3C
C
CH
Br
6
CH3
Br
Br
5
CH2
Br
Br
CH3
4
CH
C
CH3
CH3
CH3
CH3
10
H3C
CH
CH2
C2H5
11 H3C
CH
12 HC
C
C
CH
CH3
Cl
C
Cl
CH
CH3
CH3
Cl
13
CH3
14
C3H7
CH3
15
HC
C
CH
C
17 H3C
CH3
CH3
Cl
16
C3H7
CH
C3H7
CH
C
C
CH3
CH3
CH3
CH3
18
H3C
Cl
19
H2C
C
C
CH3
Br
Cl
20
HC
CH3
C
C
CH3
Br
21 H3C
22 H3C
23 HC
C
C
CH2
CH3
CH2
CH2
C
CH
CH
CH2
CH2
C
C
CH2
CH2
C
C
H2C
CH3
27
CH
CH2
CH
HC
Cl
Cl
C2H5
26
HC
CH3
CH3
C2H5
25
CH3
CH3
C2H5
24
HC
C
CH3
CH3
CH3
28
29
30