N
H
N1
C1(R)
C2
C3
O
O1
N
H
N2
C4(S)
C5
O
O2
C6
C7
C8
C9
C10
O
O3
O
H
O4
C11(R)
N
H
N3
C12(S)
C13
O
O5
C14
N
H
N4
C15(S)
C16
O
O6
C17
C18
C19
N
H
N5
C20
N
H
2
N6
N
H
2
+
N7
C21
O
O7
C22(S)
C23
C24
C25
C26
C27
C28
C29
C30(S)
C31
C32
C33
C34
C35
C36
C37(S)
N
H
N8
C38(S)
C39
C40
O
O8
N
H
N9
C41(R)
C42
O
O9
C43
C44
C45
O
O10
O
H
O11
N
N10
C46
C47
C48
C49
O
O12