TeXで描く構造式

$\spc\\\spc\sixheterov[bdf,{B\xFiveCycle(0,0){-18}[]{}[e]},{D\xFiveCycle(0,0){222}[]{2==O}[e]}]{3s==\put(188,-60){\sixheterov[]{3s==\pentamethylenei{2==\downnobond{N}{H};5==CH$\bf_3$}{1==(yl);3D==O}}{5==(yl);5FA==H}[abef]}}{}[]\put(-30,176){\tikz\draw[ultra thin,fill](0,0) -- (-0.60,0.36) -- (0.17,0.1);}$

\sixheterov[bdf,{
B\xFiveCycle(0,0){-18}[]{}[e]
},{
D\xFiveCycle(0,0){222}[]{2==O}[e]
}]
{
3s==\put(188,-60){\sixheterov[]{
3s==\pentamethylenei{2==\downnobond{N}{H};5==CH$\bf_3$}{1==(yl);3D==O}
}{5==(yl);5FA==H}[abef]}
}
{}[]
\put(-72,176){
\tikz\draw[ultra thin,fill](0,0) -- (-0.60,0.36) -- (0.17,0.1);
}