21

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O 1.03277 -0.76395 -0.70679
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C -1.16850 -1.08329 -1.47942
C -2.26159 -0.31217 -1.53288
C 3.03835 0.41668 -0.45876
C 3.75404 1.55152 0.27007
C 3.10485 2.90722 0.02951
H -0.66015 -0.60973 0.55574
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H -2.56989 0.30286 -0.69105
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H 4.78965 1.59664 -0.08662
H 3.79423 1.35317 1.34702
H 3.04413 3.13026 -1.04091
H 3.69518 3.69646 0.50576
H 2.09343 2.94738 0.44649