18
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C -2.3273261 -1.0105270 -0.4436200
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C 1.6239780 -1.1607490 -0.3255140
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H 0.4384480 0.5359740 1.4502970
H 1.6652060 0.7710610 -1.3538990
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H 0.5125020 2.7819099 -0.4581000
H -0.2879200 2.6923850 1.0152050