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Crystal data for2b: C22H20N6(368.44) F(000) = 776.000 crystal size 0.04 × 0.19 × 0.29 mm monoclinic space groupP21 Z= 4 a= 6.2341(3) b= 14.0454(5) c= 21.1540(8) Å β= 90.686(2)° V= 1852.12(13) Å3 Dcalcd.= 1.321 Mg m–3. The crystal was measured with a KappaAPEX2 diffractometer at 123 K by using graphite‐monochromated Mo‐Kαradiation withλ= 0.71073 Å Θmax= 29.017°. Minimal/maximal transmission 0.98/1.00 μ= 0.083 mm–1. The APEX software package (Apex2 Version 2 User Manual M86‐E01078 Bruker Analytical X‐ray Systems Inc. Madison WI 2006) was used for data collection and integration. From a total of 28498 reflections 5100 were independent (mergingr= 0.038). From these 4575 were considered as observed [I > 2.0σ(I)] and were used to refine 579 parameters. The structure was solved by direct methods using the program SIR92 (

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