\documentclass{standalone}
\usepackage{chemfig}
\begin{document}
\begin{math}
\chemfig{
           % 1
     >[:54]% 2
    -[:300]% 3
          -% 4
     >[:60]% 5
    -[:120]% 6
              (
        -[:180]% 7
                  (
            <[:132]% 8
            -[:204]% 9
            -[:276]% 10
                      (
            <[:222,,,2]HO% 11
                      )
            -[:348]% -> 2
                  )
        -[:240]% -> 2
              )
    <:[:60]% 12
          -% 13
    -[:300]% 14
         =_% 15
    -[:300]% 16
              (
              =O% 17
              )
    -[:240]% 18
    -[:180]% 19
    -[:120]% 20
              (
        -[:180]% -> 5
              )
              (
         -[:60]% -> 14
              )
    <[:240]% 21
}\end{math}
\end{document}

