graphkit-learn/datasets/PAH/coronene.ct

C24H12
 24 30
    5.5057   -2.5464    0.0000 C
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    6.3543    1.9635    0.0000 C
    5.5085    2.4814    0.0000 C
    4.6314    2.0186    0.0000 C
    3.7334    2.5464    0.0000 C
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    2.8393    0.9840    0.0000 C
    2.0000    0.4558    0.0000 C
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    3.7493    0.4771    0.0000 C
    4.6153    0.9771    0.0000 C
    5.4814    0.4771    0.0000 C
    5.4814   -0.5229    0.0000 C
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