Table 1. Selected geometric parameters (Å, °).

O1A—C8A	1.220 (3)	O1B—C8B	1.222 (3)
O2A—C15A	1.257 (3)	O2B—C15B	1.244 (3)
O3A—C15A	1.247 (3)	O3B—C15B	1.249 (3)
N1A—C1A	1.346 (3)	N1B—C7B	1.484 (3)
N1A—C7A	1.480 (3)	N1B—C1B	1.341 (3)
N1A—C5A	1.355 (3)	N1B—C5B	1.351 (3)
N2A—C8A	1.353 (3)	N2B—C7B	1.435 (3)
N2A—C7A	1.430 (3)	N2B—C8B	1.349 (3)
N3A—C3A	1.335 (3)	N3B—C3B	1.335 (3)
C1A—N1A—C5A	119.30 (18)	C1B—N1B—C5B	119.32 (18)
C5A—N1A—C7A	119.47 (17)	C1B—N1B—C7B	120.78 (18)
C1A—N1A—C7A	121.19 (17)	C5B—N1B—C7B	119.84 (17)
C7A—N2A—C8A	119.71 (18)	C7B—N2B—C8B	120.11 (19)
N1A—C1A—C2A	121.03 (19)	N1B—C1B—C2B	121.2 (2)
N3A—C3A—C2A	121.5 (2)	N3B—C3B—C2B	122.2 (2)
N3A—C3A—C4A	121.5 (2)	N3B—C3B—C4B	120.95 (19)
N1A—C5A—C4A	123.08 (19)	N1B—C5B—C4B	123.12 (19)
N1A—C7A—N2A	113.36 (16)	N1B—C7B—N2B	113.19 (19)
O1A—C8A—N2A	121.8 (2)	O1B—C8B—C9B	121.33 (19)
N2A—C8A—C9A	116.71 (18)	N2B—C8B—C9B	116.39 (18)
O1A—C8A—C9A	121.54 (18)	O1B—C8B—N2B	122.1 (2)
O3A—C15A—C14A	117.7 (2)	O2B—C15B—C14B	117.17 (17)
O2A—C15A—O3A	126.7 (2)	O2B—C15B—O3B	125.5 (2)
O2A—C15A—C14A	115.5 (2)	O3B—C15B—C14B	117.32 (19)