C1
C2
O
O3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
C14
C15
N
H
N16
C17(S)
C18
O
O19
C20
C22
C23
C24
C25
C26
C27
C28
N
H
N29
C30(R)
C31
C32
C33
N
H
N34
C35
N
H
2
N36
N
H
N37
C38
O
O39
N
H
N40
C41(S)
C42
O
O43
C44
C45
C46
C47
C48
C49
C50
C52
C53
C54
C55
C56
C57
C58
C59
N
H
N60
C62
C63
C64
C65
C66
C67
C68
C69
C70
C71
N
H
N72
O
O73