N
N1
C2(S)
C3
N
H
N4
C5(S)
C6(S)
C7
C8(R)
C9
O
O10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
N
N21
C22
C23
C24
C25
C26
O
O27
N
H
N28
C29
C30
O
O31
C32(S)
N
H
N33
C34
O
O35
C36
C37
C38
C39
C40
O
O41
C42
C43
C44
C45
C46
N
N47
C48
C49
C50
C51
C52
C53
O
H
O54
C55
N
N56
C57
C58
C59
C60