Fe
FE
CHA
CHB
CHC
CHD
N
NA
C1A
C2A(S)
CMA
CDA
CEA
O
O3A
O
H
O4A
C3A(S)
CAA
CBA
CCA
O
O1A
O
H
O2A
C4A
N
NB
C1B
C2B(S)
CMB
CDB
CEB
O
O3B
O
H
O4B
C3B(R)
CAB
CBB
CCB
O
O1B
O
H
O2B
C4B
N
NC(X)
C1C
C2C
CDC
CEC
O
O3C
O
H
O4C
C3C
CAC
CBC
CCC
O
O1C
O
H
O2C
C4C
N
ND
C1D
C2D
CAD
CBD
CCD
O
O1D
O
H
O2D
C3D
CDD
CED
O
O3D
O
H
O4D
C4D