18

C          1.00500        0.01610        0.17260
C          5.29790       -2.54660       -0.30690
C          4.61500        1.18740       -0.07140
C          3.22490        1.20720        0.04300
C          5.29220       -0.02680       -0.18790
C          3.18750       -1.20420       -0.07140
C          2.49900        0.01180        0.03970
C          4.58370       -1.23270       -0.19280
H          0.60180        1.03350        0.13760
H          0.71080       -0.43400        1.12590
H          0.55060       -0.54870       -0.64800
H          4.88500       -3.13070       -1.13580
H          5.19130       -3.11500        0.62240
H          6.36670       -2.40730       -0.49990
H          5.17240        2.12040       -0.06890
H          2.71390        2.16270        0.13430
H          6.37610       -0.02350       -0.27460
H          2.63010       -2.13920       -0.06470
