17
 comment:c
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C -1.4866019 0.7085130 -0.2512970
C -1.5439570 -0.6709590 -0.2541950
C 0.4066450 -1.4438080 0.5027420
C 1.3333710 -0.7662340 -0.2538770
C 1.3822560 0.6389880 -0.2510390
H 0.4982730 2.4725690 0.4143800
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H 1.8674361 -1.2743100 -1.0537310
H -1.4401000 -1.2138031 -1.1877390
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H 0.0824910 -1.0565400 1.4625940
H 0.2069810 1.0164649 1.4842499
O 2.1408131 1.1988890 -1.2476190
H 2.1772211 2.1522031 -1.1045181