# Looking for help of Chemfig professional to draw a complex molecule

Can someone help me with the complex drawing of iron(II) protoporphyrin IX using chemfig or else? I know this is a bad question but this exceeds my skills by far (i just began using this package) and i don't want to implement it as picture because i want to modify it further with a reaction scheme and tikz. Thanks in advance.

i got till this:

 \chemfig{
?[a]-[::+63]*5(
-N?[b]-(
-=[::-54]*5(
-N?[c]=(
-=[::-54]*5(
-N?[d]-(
=-[::-54]*5(
=N(-[::-54,1.5]Fe?[b,,thick,dotted]?[c]?[d,,      thick,dotted])
-[,,1]?[a]-(-[::-54])=-(-)-
)
)
-(-)=(-[::-60]-[::-60]-(-[::+60]OH)=[::-60]O)-
)
)
-(-[::-60]-[::-60]-(-[::+60]OH)=[::-60]O)=(-)-
)
)
=(-)-(-([::+40]=))=
)
}


but there is still something to do and i can't get it.

Here is something to get you started, based upon the Porphyrin example from the gallery in chemfig's manual:

\documentclass{article}
\usepackage{chemfig}
\begin{document}

\chemfig{
a-?[a]=[::+63]*5(
-N?[b]=(
-(-[::63]d)=[::-54]*5(
-N?[c]-(
=(-[::63]g)-[::-54]*5(
=N?[d]-(
=(-[::63]j)-[::-54]*5(
-N(-[::-54,1.5]Fe?[b,,dotted]?[c]?[d,,dotted])
-[,,1]?[a]=(-[::-54]l)-(-k)=
)
)
-(-i)=(-h)-
)
)
-(-f)=(-e)-
)
)
-(-c)=(-b)-
)
}

\end{document}


• @ clemens: thank you very much. i updated the post because there a still some things i can't get. do you have any help? thx – Jaska Nov 20 '15 at 18:20