H
0
2
H
0
1
H
0
3
C2H5O5
0
2
C2H5O5
0
2
H
0
1
H
0
1
H
0
1
H
0
1
H
0
1
H
0
1
H
0
1
H
0
1
H
0
1
H
0
1
H
0
1
H
0
1
H
0
2
H
0
2
H
0
1
H
0
1
H
0
1
H
0
1
H
0
1