H H H
\ | /
C -- C == C -- C -- C
// | || \\
H - C | || C - H
\ | || /
C -- NH N -- C
// \\
H - C C - H
\ /
C == N HN -- C
/ | | \\
H - C | | C - H
\\ | | /
C -- C == C -- C == C
/ | \
H H H
Porphyrin
CH2
//
C H CH3
\ | /
H C -- C == C -- C -- C H H
| // | || \\ | |
H - C- C | || C - C == C - H
| \ | || /
H C -- N- N -- C
// \\
H - C Fe2+ C - H
\ /
H C == N -N -- C
| / | | \\
H - C - C | | C - CH3
| \\ | | /
H C -- C == C -- C == C
/ | \
C H C
\ /
C C
/ \
C=0 O=C
| |
OH OH
Haem