N
N1A
C2A
N
N3A
C4A
C5A
C6A
N
H
2
N6A
N
N7A
C8A
N
N9A
C1B(R)
C2B(R)
O
H
O2B
C3B(S)
O
O3B
P
P3B
O
O7A
O
H
O8A
O
H
O9A
C4B(R)
O
O4B
C5B
O
O5B
P
P1A(S)
O
O1A
O
H
O2A
O
O3A
P
P2A(S)
O
O4A
O
H
O5A
O
O6A
CBP
CCP
CDP
CEP
CAP(R)
O
H
OAP
C9P
O
O9P
N
H
N8P
C7P
C6P
C5P
O
O5P
N
H
N4P
C3P
C2P
S
S1P
C
O
O
CH3