Effective bond order for conformers 1A and 1B.

Bond	MBO at 6-31G**		LBO at 6-31++G**
	1A	1B	1A	1B
N4–H24	—	0.1867	—	0.0011
N7–H24	0.1497	—	0.0006	—
C15–O23	1.0574	1.0746	0.5981	0.5917
O23–H24	0.7432	0.7011	0.5103	0.4638