N
N1
C1
C2
O
O1
C3
O
H
O2
C4
C5
C6
N
H
N2
C7(S)
C8
O
O3
C9(R)
O
O4
C10
N
H
N3
C11(R)
C12
O
O5
C13
C14
N
N4
C15(S)
C16
O
O6
C17
C18
C19
N
N5
C20(S)
C21
O
O7
C22
C23
C24
C25
C26
C27
C28
N
N6
C29
C30
C31
C32
C33
N
N7
C34
O
O8
C35(S)
N
N8
O
O9
C36
C37
C38
C39
C40
C41
C42
C43
N
H
N9
O
O10
C44(S)
C45
C46
C47
C48
C49
C50
H
H18
H
H45