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Figure 1 . ORTEP plot (Johnson, 1965) showing the atomic numbering scheme. The probability ellipsoids are drawn at the 50% probability level, the H atoms are drawn with arbitrary radii. Selected distances: C1—N2 1.2868 (15) Å, C1—C101 1.4862 (16) Å, C1—C11 1.4936 (16) Å, N2—C3 1.4769 (14) Å, C3—C21 1.5128 (15) Å, C3—C4 1.5369 (15) Å, C4—C41 1.5073 (15) Å, C41—N5 1.3152 (14) Å, C41—C101 1.4293 (15) Å, N5—C51 1.3764 (14) Å. |