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Figure 5 Part of the hydrogen bond ribbon. Even though mol­ecules A and B have different configurations, the hydrogen bonding between A and B is very similar to that between B and A (Table 1). The short inter­nal contact involving N—H⋯O is probably not a real hydrogen bond because the angle is too acute, but it may play a role in conserving the geometry in this region (Table 1).

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COMMUNICATIONS
ISSN: 2056-9890
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