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Figure 3
An extended chain forming an N—H⋯O hydrogen-bonded C(6) packing motif in the crystals of (I)–(IV) along (a) the b axis (I), (b) the a axis (II), (c) the [101] direction (III) (accompanying C—H⋯O interaction is not shown) and (d) the a axis (IV). Only relevant H atoms are displayed. Symmetry codes are given in Table 2 ![]() |