18 comment:c C -1.0257970 0.6436950 -0.6609570 C -1.0320489 0.6424540 1.4823180 C 0.3050750 0.6411090 1.9585660 C 1.6157531 0.6440560 0.2867970 C 1.1443620 -0.3994230 -0.5263120 C -0.1560440 -0.4148470 -0.9934770 H -2.0695469 0.5698000 -0.9675810 H -1.6117070 1.5581729 1.5769190 H 0.6934050 1.5572619 2.3990850 H 2.6185861 0.5615070 0.7031620 H 1.6999609 -1.3321490 -0.5910900 H 0.6894850 -0.2669070 2.4143579 H -1.6187969 -0.2656190 1.5936730 H 1.3294070 1.6672220 0.0550480 H -0.6427310 1.6604350 -0.6629500 N -0.6375750 -1.6660700 -1.5353020 H -1.5128570 -1.9219980 -1.0845070 H -0.8537090 -1.5592279 -2.5229340