O
O8
C8
C9
C10(S)
C12
C11
O
O11
N
N7
C6
C5
C4
C3
C2
C1
C13
O
O13
O
O14
C15
C16(S)
C21
C20
C19(S)
O
O19
C22
C18(S)
C17(R)
C26(S)
N
N23
C24
C25
C23
C30(R)
C33
C34(R)
C35(S)
O
O35
C37
C36
C31(R)
C38(S)
O
O38
C39
C32(R)
O
H
O32
C27(S)
O
H
O27
C28(S)
O
O28
C29
H
H17
H
H26
H
H30
H
H34
H
H31