\chemfig{
                           \mcfatomno{1}% 1
                   -[:90,2]\mcfatomno{2}% 2
          -[,2,,,draw=none]\mcfatomno{5}% 5
                  -[:270,2]\mcfatomno{3}% 3
                              (
                      -[:180,2]\phantom{1}% -> 1
                              )
               -[:45,1.131]\mcfatomno{7}% 7
      -[:180,2,,,draw=none]\mcfatomno{4}% 4
                              (
                  -[:225,1.131]\phantom{1}% -> 1
                              )
                   -[:90,2]\mcfatomno{6}% 6
                              (
                  -[:225,1.131]\phantom{2}% -> 2
                              )
                      -[,2]\mcfatomno{8}% 8
                              (
                  -[:225,1.131]\phantom{5}% -> 5
                              )
                              (
                      -[:270,2]\phantom{7}% -> 7
                              )
                              (
    -[:195.9,2.912,,,draw=none]\phantom{2}% -> 2
         -[,2,,,mcfx={100}{10}]\phantom{5}% -> 5
                              )
                              (
          -[:270,2,,,draw=none]\phantom{7}% -> 7
     -[:180,2,,,mcfx={100}{10}]\phantom{4}% -> 4
                              )
}