4

C      -0.126338640475018     -0.039023262478899     -0.217806927196530
C       1.718138927456429      1.267160691478363      0.194102356536350
C       1.296086892008149     -0.117988029405912      1.159151220211259
C      -0.279975180264136      1.276964267043742      1.416615582216835