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Figure 2
The two-dimensional sheet of (I)[link] parallel to the ab plane, including a chiral helical chain (the horizontal bars represent the screws) and three types of hydrogen bonds (pink, bright green and lime dashed lines in the electronic version of the paper). Generic atom labels without symmetry codes have been used.

Journal logoSTRUCTURAL
CHEMISTRY
ISSN: 2053-2296
Volume 69| Part 12| November 2013| Pages 1488-1493
doi:10.1107/S0108270113030163
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