TeXで描く構造式

$\sixheterov[bdf,{B\SevenCycle(0,0){-38}[b]{2s==\exosinglebond{-154};3==N;5s==\exodoublebond{0};6s==\exosinglebond{50};6==N}[g]}]{1s==\put(590,90){O}}{5==O$\bf_2$N}[]\put(-693,-650){\rotatebox{18}{\bzdrh[l]{4==}}}\put(180,-54){\sffamily\bfseries F}\put(-140,840){\sffamily\bfseries CH$\bf_3$}$

\sixheterov[bdf,
{B\SevenCycle(0,0){-38}[b]{2s==\exosinglebond{-154};3==N;5s==\exodoublebond{0};6s==\exosinglebond{50};6==N}[g]}]{1s==\put(590,90){O}}{5==O$\bf_2$N}[]
\put(-693,-650){\rotatebox{18}{\bzdrh[l]{4==}}}
\put(180,-54){\sffamily\bfseries F}
\put(-140,840){\sffamily\bfseries CH$\bf_3$}