N
N1
C2
O
O2
N
H
N3
C4
O
O4
C5
C6
P
PA
P
PB
C1'(R)
O
O1A
O
H
O1B
C1D(R)
C2'(R)
O
H
O2'
O
H
O2A
O
O2B
C2D(R)
O
H
O2D
C3'(S)
O
H
O3'
O
O3A
O
O3B
C3D(S)
O
H
O3D
C4'(R)
O
H
O4'
C4D(R)
O
O4D
C5'(R)
O
O5'
C5D
O
O5D
C6'
O
H
O6'
O
OAB
CAP
CAQ
S
SAZ
CBA
CBE
CBF