H
0
1
H
0
2
H
0
1
H
0
5
C2H5O5
0
2
H
0
1
H
0
1
C2H5O5
0
2
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
H
0
1