TeXで描く構造式

$\spc\\\trimethylene{1==H$\bf_2$N;2s==\carbonylrotate{35};2s==\carbonylrotate{-35};2==\hspace{-0.65mm}\textcolor{white}{■};2==S;3s==\sixheterov[ace]{3s==\tetramethylenei[b]{2==\put(-8,22){N};3==N;4s==\sixheterov[bdf]{}{1==NH$\bf_2$;3==NH$\bf_2$;6==(yl)}[]}{1==(yl)}}{6==(yl)}[]}{}$

\trimethylene{1==H$\bf_2$N;2s==\carbonylrotate{35};2s==\carbonylrotate{-35};2==\hspace{-0.65mm}\textcolor{white}{■};2==S;
3s==\sixheterov[ace]{
3s==\tetramethylenei[b]{2==\put(-8,22){N};3==N;
4s==\sixheterov[bdf]{}{1==NH$\bf_2$;3==NH$\bf_2$;6==(yl)}[]
}{1==(yl)}
}{6==(yl)}[]
}{}