N
N1
C2
N
H
2
NA2
N
H
N3
C4
O
O4
C4A
N
N5
C6(S)
C7
N
H
N8
C8A
C9
N
H
N10
C11
C12
C13
C14
C15
C16
C
O
O
N
H
NG1
CA1(S)
CB1
CG1
CT1
O
O11
O
H
O21
C5A
O
O5B
O
OEB
CD1
N
H
NG2
CA2(S)
CB2
CG2
O
O12
O
H
O22
CT2
O
OEC
CD2
N
H
NG3
CA3(S)
CB3
CG3
CD3
O
OED
O
H
OEN
O
O13
O
H
O23
CT3