17
 comment:c
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C -1.1267810 -1.0510080 -0.7138040
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C 1.8558830 -1.1128720 -0.5761980
C 1.9420151 0.3438710 -0.6182870
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H 1.0191590 -2.8890700 0.2215810
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H -0.8824790 0.9370690 -1.4137670
H 0.6238520 -1.3409950 1.1426671
H 0.7505210 0.8173720 1.0822570
H 2.5105009 0.7707230 -1.4433050
H 1.3237309 2.2475650 0.0760330
C -1.7421430 0.9067100 0.5565280
N -2.2180381 1.4019600 1.4898450