P
PA(S)
O
O1A
O
H
O2A
C3A
P
PB(S)
O
O1B
O
H
O2B
O
O3B
P
PG(R)
O
O1G
S
H
S2G
O
O5D
C5D
C4D(R)
O
O4D
C3D(S)
O
H
O3D
C2D(R)
O
H
O2D
C1D(R)
O
O5'
C5'
C4'(R)
O
O4'
C3'(S)
O
H
O3'
C2'(R)
O
H
O2'
C1'(R)
N
N9
C8
N
N7
C5
C6
N
H
2
N6
N
N1
C2
N
N3
C4
N
N9A
C8A
N
N7A
C5A
C6A
N
H
2
N6A
N
N1A
C2A
N
N3A
C4A