1
2
2
3
4
---------------
5
C6H6
6
7
OH
3,2,1
8
2,1
9
10
11
12
13
(C2F4)
MTBE
-2
14
15
16
17
PVA
18
19
20
21
CCI3
CCI4
22
23
2
2
24
25
26
27
28
29
-
(OH)
-
R - OH
-
R-X
MTBE
R O R
O
||
R C H
O
||
R C R
PVA
O
||
R C OH
O
||
R C O R
H
|
H N H
R
|
H N H
R
|
H N R
R
|
R N R
OH
OH
- OH