18
 comment:c
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C -2.0397100 -1.1492029 -0.3988870
C 0.7033050 -1.9914531 0.4506710
C 1.2876410 -1.1470770 -0.4082640
C 1.2330090 0.3135490 -0.4102230
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H 0.1493880 0.5795170 1.3826460
H 1.6930940 0.8202530 -1.2586631
N 0.4762110 2.4353781 0.5125750
H 0.6275970 2.8835649 -0.3808510
H -0.3355550 2.7996161 0.9888160